Coffee grounds for flowers
How To Use Coffee Grounds To Power Your Garden, Annuals & Perennials
Did you know that when you use coffee grounds in your vegetable garden, it can help to power your plants like never before?
The same can be said for putting them in flowerbeds, hanging baskets and container plants as well. And while on the subject, they also happen to be pretty terrific in a compost pile too.
In fact, when it comes to helping out just about any living plant or organism, coffee grounds rock! Who knew the by-product of such a popular morning beverage has so much value beyond waking us up?
Listen in to our podcast on coffee grounds and egg shells below!It is amazing how quickly you can improve your soil with a few simple organic practices. Working in compost to the soil is one of the best for sure. As is adding in organic materials like shredded leaves and aged manure.
And, of course, there is always the huge benefit in growing a cover crop every fall.
But one of the easiest ways of all to help build your soil and power your plants is simply by using coffee grounds. And best of all, they are completely free.
The power of the left over remains of your morning coffee on plants is simply amazing. We use our grounds all over the landscape to add power to our plants and soil.In fact, even if you don’t drink coffee you can get them at no cost. Many local coffee shops are more than willing to save their grounds for gardeners. All you have to do is ask!
We have had local coffee shops save them for us for years. Some even create lists in their stores to dole out the spent grounds to as many gardeners as possible. And yes, while we are on the subject, we are talking about used coffee grounds – not the fresh version. After all, that could get bit pricey for sure!
So What Makes Coffee Grounds So Great?
First and foremost, coffee grounds are an excellent, slow-release source of nitrogen. And nitrogen is a key component in making flowers flower, and vegetable plants produce.
But in addition to providing nitrogen, coffee grounds add incredible organic material and matter to the soil. All of which helps to improve the overall soil structure.
When placing in a compost pile, the grounds and filter can both go in. Bleach free filters are also biodegradable.That results in better drainage, aeration and increased water retention for the plants growing in the soil. And not just garden plants, but flowers, herbs and more. Here is a look below at 5 great ways to use coffee grounds in your landscape.
Using Coffee Grounds In The Garden
We use coffee grounds in a whole slew of ways in our vegetable garden.
When we initially plant, we add a few tablespoons of grounds (along with worm castings, crushed egg shells and compost) to every planting hole. This little concoction helps provide nutrients directly to the plants as they grow. See Our Article: 3 Big Garden Planting Tips
But it goes far beyond using in just the planting holes. We also put coffee grounds on the soil surface around plants. This serves two great purposes.
First, it provides a slow-release of nutrients every time it rains or you water. The nutrients leach through the soil from the moisture, helping to provide power to the plants via their roots.
But the coffee grounds on the surface also help to repel slugs as well.
Slugs delicate skins are easily cut as they crawl across the sharp edges of the grounds. So placing them around the main stalk helps provide a ring of protection, and in the process, helps keep plants safe.
Although it might not be 100 percent effective as a deterrent, every little bit helps for sure!
How To Use Coffee Grounds In Hanging Baskets & Containers
Coffee grounds are an excellent slow-release fertilizer for planters and hanging baskets too. In fact, it is one of our secret weapons to keep our container plants going strong all season long.
Along with worm castings, we add a few tablespoons of coffee grounds to all of our pots and containers every few weeks. To do so, we simple sprinkle them on the surface of the soil of each container or basket.
One of the best ways to collect and keep coffee grounds is in a zip lock bag in the freezer. It keeps them easily and without worry of them molding.When the plants are watered, the nutrients from the coffee grounds slowly leach into the soil. As they do, the plant’s roots soak them up, and the magic follows.
How To Use Coffee Grounds In Flower Beds
Much like with our vegetable plants, we use our grounds when we plant annuals in our flowerbeds.
A few tablespoons in each planting hole helps to power the plants. And it continues to help build the soil up each year as well. In addition to the trace nutrients the grounds provide, they help to add structure to the soil. And that structure is important for good drainage, and providing air channels for water and nutrients to flow in.
In addition, coffee grounds can also be added around the base of each plant as a slow release fertilizer, just like with the garden and container plants. Again, every time you water or it rains, the nutrients flow down into the soil. They also help again with protecting against slugs.
How To Use Grounds On Perennials, Shrubs and Trees
Yep, you guessed it. Coffee grounds can help as you plant perennials, shrubs and bushes too!
Using spent grounds in hanging baskets and containers is a great way to add nutrients to your plants – for free!Adding a few tablespoons when planting perennials helps add nutrients and soil structure for long-term growth. For larger bushes or shrubs, we simply add a few coffee filters and grounds all at once around the planting hole.
The filters are bio-degradable. And as the grounds break down over time, they give back nutrients to the roots. It is the ultimate trench composting method made easy! See: How To Trench Compost
How To Use Coffee Grounds In The Compost Pile
In the spring, summer and fall, we use our coffee grounds in the landscape. But in the winter, we use them to power our compost pile!
Check Out Our Latest Garden Podcast:
They are an excellent “green source” addition to a compost pile. As a green source, coffee grounds help to heat up the pile fast. This means quicker decomposition, and a faster path to more compost.
Simply throw in your filter and grounds – and watch the magic happen!
Here is to using coffee grounds in your garden and flowerbeds this year, and to your best growing season ever! Happy Gardening -Jim and Mary.
As always, feel free to email us at [email protected] with comments, questions, or to simply say hello! You can sign up for our free email list in the subscribe now box in the middle of this article. Follow us on Facebook here : OWG Facebook. This article may contain affiliate links.
Are coffee grounds good for plants?
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Coffee has undeniable benefits when it comes to waking up the human body (especially during the pre-noon hours). However, its power is not limited to the kitchen. Instead, this caffeinated staple is equally as impactful in the garden, where experts are using coffee grounds to benefit their plants.
'Used coffee grounds – left over from using a coffee maker – contain a substantial amount of nitrogen, as well as potassium and phosphorus,' says coffee expert Lewis Spencer of Coffee Direct .' These properties make them perfect for garden activities, such as composting. It's an innovative way to make use of something that would otherwise have ended up in landfill.'
However, its power doesn't end there. Here's everything you need to know about this organic garden idea – according to those in the know.
Are coffee grounds good for plants? Everything you need to know
(Image credit: GettyImages)
So, we've established that coffee grounds are good for plants. But what does the process involve? And does it work on all greenery? You can boost your plants with our expert tips below.
How to use coffee grounds as fertilizer
Did you know that your coffee grounds can be used as a slow-release fertilizer?
'I always use coffee grounds as fertilizer,' says James Gray, founder of Barista & Co . 'Some sizes of grounds can’t go down the sink, so giving them to your plants is a great way to reduce waste.'
Lewis Spencer adds: 'To use coffee compost, simply sprinkle the grounds directly onto your soil and lightly rake it in. Coffee grounds add organic material to the soil, helping water retention, aeration, and drainage.
'Leftover diluted coffee can create a liquid plant fertilizer, too. Simply mix two cups of brewed coffee grounds with five gallons of water in a bucket overnight.'
(Image credit: GettyImages)
How to make compost with used coffee grounds
If you are investigating how to make compost, the experts recommend adding coffee grounds to your ingredients.
'Scientists state that a balance of 'greens' and 'browns' is needed to create the proper environment for composting to occur,' say the plant doctors at Patch Plants .
‘Greens' are nitrogen-rich materials that are used by microorganisms in the soil for their growth and reproduction, and 'browns' are carbon-rich materials used to feed microorganisms and give them energy.
'Greens' include items like fruit and vegetable peels, and used coffee grounds. 'Browns' include items such as dried leaves, twigs and newspaper.
'When mixing green and brown together you should remember the ratio 1:4 (1 part green, 4 parts brown). If you have too much green material your compost pile will start to smell (a bi-product of microorganism reproduction is ammonia). If you don't have enough green material, the compost pile won't heat up because the microorganisms don’t have enough energy to do their thing.
'After about three months your old coffee grounds will have been transformed into nutrient-rich compost giving your plants a much needed boost.
'Remember to mix your compost thoroughly. If you leave coffee grounds on the surface of the soil, without raking them in and exposed to the air, they can dry out. Dried-out coffee compacts and will act as a barrier, preventing water from reaching the soil beneath. So mix-mix-mix and wait.'
If you practise vermi-composting with a worm bin, coffee grounds are a must as worms love them. For a small bin, add a cup of grounds per week to feed their addiction. Avoid adding too much at once because the acidity could negatively impact your worms. Paper coffee filters can even go in too.
Which plants like coffee grounds most?
Acid-loving plants in particular love coffee grounds because they will lower the pH level of soil, causing it to become more acidic,' says Jason White, the CEO at All About Gardening . 'Your roses, azaleas, lilies, and hollies because they are acid-loving plants that will thrive best in the acidic characteristic of coffee grounds,' he adds.
The plant doctor at Patch Plants adds that many plants will benefit from a coffee compost that follows the correct 4:1 method. '[Ensure] it's not just put on the top of the soil where it's left to harden and prevent water from entering the soil. '
(Image credit: Alamy )
However, while coffee grounds have their undeniable benefits, Lindsey Hyland from Urban Organic Yield warns that this trick does not work for every plant.
'Tomatoes and rhododendrons are coffee-ground sensitive and may develop brown leaf tips if they come into contact with the grounds,' she says. So, if you're looking growing tomatoes, it may be better to keep remnants of your brewed beverage away.
Similarly, Kate Russell from the Daily Gardener urges you to keep coffee grounds away from freshly seeded areas, as they can reduce germination.
Are coffee grounds good for hydrangeas?
Your hydrangeas will definitely get a bloom-boost from your recycled coffee grounds.
James Gray says: 'Coffee makes the soil more acidic and is packed with nitrogen, which hydrangeas go wild for, making them become super bright and colourful.
'Essentially coffee is a fruit, so think of the amount of nutrition the soil gets from things like dropped apples and berries as this works in the same way. '
Are coffee grounds good for grass?
Your grass could be greener – and longer – with the addition of coffee grounds in the soil.
James Gray comments: 'Try mixing them through the soil in your indoor plants, or if you collect a larger amount, sprinkle them in grassy areas for a little growth boost.'
(Image credit: GettyImages)
Are coffee grounds good for roses?
The high nitrogen content makes used coffee grounds a good growing companion for roses, as it helps take the pH from neutral to acidic – you can find out about how to test the pH of soil in our guide.
Some experts suggest that you can sprinkle your coffee grounds in the soil next to the plant, but others warn that you should be careful not to put too much on as the high nitrogen content could actually burn – and kill – them. Do not use more than a cup for each bush.
Alternatively, you could mix one cup of grounds with one gallon of water per bush and use this mix to water the plants so your roses are particularly bright and beautiful. And you can also use your coffee compost if you have made some.
Do coffee grounds deter slugs?
Coffee grounds are a great repellent for getting rid of slugs and snails. Simply spread the grounds around vulnerable plants to create a barrier against the insects.
Lewis Spencer says: 'Research shows that caffeine is effective in repelling slugs and snails when applied to foliage or the growing medium of plants. This is because of the naturally abrasive properties of coffee: soft critters tend to avoid rough surfaces.'
Where can you get coffee grounds?
It is possible to enjoy coffee's benefits, even if you're not an avid drinker. Kate Russell suggests asking for used coffee grounds from neighborhood coffee houses, as they are likely to pass them along for free.
'Coffee grounds contain up to 10% nitrogen after brewing. They also contain cellulose (carbohydrates), structural lignin (woody plant parts), triglycerides (oils), lipids (fats), protective phenolics (flavonoids/non-flavonoids), and essential oils,' she says. Now you have every excuse to call into your coffee house at the next opportunity.
Ruth Doherty is an experienced digital writer and editor specializing in interiors, travel and lifestyle. With 20 years of writing for national sites under her belt, she’s worked for the likes of Livingetc.com, Standard, Ideal Home, Stylist and Marie Claire as well as Homes & Gardens.
90,000 coffee grounds as a fertilizer for indoor flowers and gardeners in 2022 on the GudgrintContent
- Useful properties of coffee grounds
- Use coffee as fertilizers
- The use of coffee dumb coffee in the garden 9000,000 as compost
- How else to use grounds
- Where to get enough grounds
All this is possible thanks to useful substances contained in coffee grounds. You can talk a lot about the beneficial properties of sleeping coffee and its use as a fertilizer for indoor flowers and garden plants, but this issue should be dealt with in more detail.
Benefits of coffee grounds
Ground coffee contains a lot of valuable substances. This is:
- potassium;
- calcium;
- magnesium;
- nitrogen;
- phosphorus;
- a number of other useful minerals.
Undoubtedly, during the brewing process, some of these substances are washed out of the coffee grounds. The content of useful mineral components in sleeping coffee is approximately 2-3% (for different substances it is different). But even this amount is enough to use coffee grounds as a mineral fertilizer for home and garden flowers, vegetables, and ornamental plants. The substances contained in coffee waste are essential for their growth and development.
For example, nitrogen plays a key role in the process of photosynthesis, without which plant growth and the formation of oxygen are impossible. Phosphorus and potassium are also involved in this important process, contribute to the development of the plant, the formation of flowers and fruits.
Using dormant coffee as a fertilizer is a virtually free way to provide your plants with healthy mineral nutrition.
At the same time, the probability of harming them from an overdose of one or another component is equal to zero. The concentration of minerals in the thick is optimal for many indoor flowers, garden and garden plants.
Potted flowers are particularly susceptible to coffee ground fertilizer:
- azaleas;
- begonias;
- ferns;
- roses.
A good result is the use of dormant coffee to feed vegetables, including:
- carrots;
- tomatoes;
- peppers;
- radish;
- peas and beans.
This fertilizer is suitable for garden roses, lilies, ornamental shrubs, herbs.
Drinking coffee is an excellent means of feeding fruit and berry bushes and trees. After its application, the yield of these crops increases.
It is believed that coffee residues are highly acidic and therefore unsuitable for many plant species. This is not entirely true. The grains do have a high acidity. However, excess acid is washed out during the brewing process. Coffee grounds have a neutral level of acidity and as a fertilizer is suitable for feeding any plants.
Use of coffee grounds as fertilizer
Coffee grounds are used to fertilize plants in two ways:
- Liquid top dressing. This method is very simple. It consists in the fact that coffee residues (thickness and part of the liquid) are collected in one container. Then this composition is watered on the ground in flower pots or under garden plants. This method has one significant disadvantage: a wet substance is prone to infection with mold or fungi. Therefore, to fertilize potted plants, it is recommended to use dry top dressing.
Helpful Hint: To fertilize garden beds or garden shrubs, thin out the grounds until they are ready to be watered. Water the plants from above with a watering can, then pour plain water over them. This will allow the minerals to slowly release into the soil, nourishing your plants.
- Dry dressing. Dry the coffee beans thoroughly before use. To do this, after draining a small amount of thick, evenly distribute it on a sheet of thick cardboard or waterproof paper. You can use plastic spacing or baking sheets from the oven. Place the prepared thick in a warm place and keep it there until completely dry. When the substance dries, do not forget to break the caked lumps. Fertilizer can be used immediately or stored in dry glass, plastic or tin cans with tight-fitting lids. Thick paper bags are also suitable for this purpose.
Use of coffee grounds in the garden
Dried dry coffee is poured under the plant, then the soil is slightly loosened. When watering, useful substances will be released and flow into the ground, gradually enriching it.
When using this fertilizer in the garden, it is dug into the ground under the plants. With the help of a shovel, the earth is dug up to a depth of about 5 cm. Dry thickening is added to the loose soil. For one tree - 1-2 glasses, depending on the size. Then the thick is sprinkled with earth and lightly tamped.
Helpful hint: don't put too much ground (so that it covers all the ground under the plant). In this case, when watering, a crust may form, which will interfere with the access of oxygen to the roots. Do not add thickening to the soil for seedlings. It will weigh down the soil and slow down germination.
Sleeping coffee for flowers
Coffee sludge is especially popular as a fertilizer for indoor plants and garden flowers. For fertilizing indoor flowers, it is recommended to prepare the following composition:
- 50% coffee grounds;
- 20% chopped dry straw;
- 30% foliage.
Mix all ingredients and let them rot. To do this, you can use a large tank or an old pan. The mixture should be covered with fertile soil on top, make several holes with a stick and let it mature for about a month. The resulting composition can be used as nutritional supplements, making them into flower pots.
When planting flower beds and laying flower beds, coffee residues can also be used. Forming a flower garden, add them to the ground. On a bucket of earthen mixture, you should take one glass of dry thick, mix everything thoroughly, after which you can plant flowers. After planting the plants, the soil must be watered abundantly.
Coffee pomace as compost
Minerals, primarily nitrogen, contained in coffee residues tend to be released gradually under the influence of microorganisms. This makes coffee pomace a valuable component of garden compost. To do this, it is collected and placed in a compost pit. Thick contributes to the speedy decay of the contents of the pit, improves its mineral composition.
Coffee pomace can also be added directly to planting holes for garden ornamental and fruit-bearing plants. To do this, dry cake is mixed with prepared soil. A plant is planted in the prepared soil and watered abundantly.
Helpful Hint: Try using compost containing coffee residue to grow mushrooms. According to the reviews of those who used this method, the yield increases by 2-3 times.
How else to use grounds
Coffee grounds can not only enrich plants with useful minerals, but also protect them from a wide variety of pests. Insects such as ants, slugs, snails, aphids and others do not like it. Using grounds allows you to safely and inexpensively protect your plantings. It can also be used to prevent the appearance of insect pests.
Coffee grounds may just be indispensable in your garden. This is an excellent tool for changing the structure of the soil. Adding thickening will make heavy and clayey garden soil looser and lighter. To do this, the cake is added to the soil and regularly loosened.
Drinking coffee and coffee residues can also attract beneficial insects. Including earthworms. This property is especially important for composting. Worms, processing the contents of the compost pit, loosening it, contribute to the rapid maturation of the compost.
Cats do not like coffee aroma. With the help of thick, you can wean your pet from shitting under your favorite bush. You just need to sprinkle a dry product in a thin layer and do not water for a while.
Where to get enough grounds
First of all, do not throw away after drinking the drink itself. So, in a few days you can collect a sufficient amount of thick. Good for use as a fertilizer or compost cake from a coffee machine.
In some cafes and restaurants abroad, and in our country, a special table has recently appeared with packages that say "Coffee grounds for your plants" or "Coffee scrub for you." They are a useful and pleasant present for visitors to the institution. Feel free to grab a few bags. They will only benefit your plants.
Therefore, you should not throw away such a useful product as coffee cake. Following the tips given here, you are sure to find a use for it in the garden or when breeding indoor flowers.
Coffee as a fertilizer and 6 more ways to use grounds for plants and gardens
What tireless gardeners and gardeners try in the hope of lush flowering and an excellent harvest of green pets. Literally everything that is at hand goes into action. For example, natural ground coffee. There is so much grounds left after eating, so why not try it in the garden?
As experiments have shown, coffee can really be useful for gardening. Practical owners do not get rid of the thick, but use it both as a fertilizer, and to destroy pests, and as a means of combating plant diseases. The product is natural, which means, according to adherents of folk remedies, it will not harm either the land or the crops grown on this land.
According to summer residents, cucumbers, strawberries, radishes and carrots are especially fond of coffee. From flower crops - roses, gladioli and peonies.
Opponents of the use of coffee in the garden claim that this product makes the soil too acidic. Really fresh coffee has a high hydrogen index (pH) and is able to acidify the soil, but sleeping coffee that has lost its strength is completely neutral. It does not change the acid-base balance of the earth.
In addition, it is believed that coffee in the ground can provoke the appearance of harmful insects and the development of fungal diseases. In some cases, this is true, so before using coffee for plants, it must be prepared.
Firstly, the product should not contain any sugar or milk, so coffee straight from the cup is not suitable for plants. Secondly, the coffee grounds after brewing should be washed several times with clean water and then dried. And finally, coffee should be calcined (hold for 10-20 minutes in a hot thick-walled pan). After all these manipulations, the powder will become completely harmless and suitable for further use in the garden.
[!] To prevent the soil from rotting, becoming moldy and infested with pests, use only sleeping, washed and dried, and, if possible, calcined coffee without traces of milk and sugar on the site.
Coffee as a fertilizer
Growers and gardeners most often use dormant coffee as a fertilizer.
Coffee has been proven to be very rich in magnesium. Therefore, first of all, they are recommended to feed those plants that are deficient in this trace element. But how to understand that a culture needs magnesium? Very simple - on the leaves.
When magnesium is deficient, the interveinal sections of the leaf blade turn reddish-brown (sometimes dark yellow), while the veins themselves do not change color and remain green. Only old (lower) leaves suffer, young leaves remain green. Sometimes, with a lack of magnesium, the edge of the sheet is deformed (twisted) or brown spots appear along the edge of the plate.
In addition, coffee is believed to be rich in nitrogen, an element that is especially needed for young, recently planted crops, since it is nitrogen that helps to build up a dense green mass.
You can also determine the lack of nitrogen on the sheet. If this element is not enough, the lower leaves of the plant turn yellow, and the veins turn yellow first, and then the interveinal areas. The plant looks lethargic, slowly developing: no new shoots, small leaves, few inflorescences.
If all signs of magnesium or nitrogen starvation are present on the plant, you can try to feed it with coffee.
The spent coffee grounds should be mixed with the soil or simply poured into the bottom of the hole, after which the plant should be planted. In the case when the culture is already planted, coffee should be lightly dug in the top layer of the earth and watered abundantly.
Coffee against plant diseases
According to experienced gardeners, coffee can save plants from certain diseases. It is especially good for black spot and rose rust, diseases caused by pathogenic protozoan fungi.
In order to prevent dangerous diseases, in the spring, before the vegetation begins, coffee should be scattered around the rose and slightly buried, mixed with the top layer of the earth.
Coffee grounds to change soil structure
Why change soil structure? This is necessary so that too dense packed earth becomes loose, airy, and too light, on the contrary, more nutritious. Since ideal soil is rare, various additives are used to improve the properties of the substrate. One such additive is drunk coffee.
Coffee is especially good for soils with a high clay content. This soil has a very dense structure. It does not pass water and air well, which, of course, negatively affects the development of plants. When the clay earth is saturated with moisture, it is heavy and sticky, and when it dries, it hardens to the state of stone and is covered with deep cracks.
In order to make clay soil more loose, airy, water and breathable, it is mixed with minerals (sand, vermiculite, perlite) or organic matter (compost, sawdust, straw, fallen leaves). One good leavening option is coffee grounds.
It is very easy to use: mix the soil with dry coffee pomace and plant the plants. In this case, the total proportion of coffee in the soil should not exceed 10%.
Coffee in a compost heap
As you know, a compost heap is a place where gardeners and gardeners dump various organic waste. Grass, leaves, straw, cut plant residues (with the exception of diseased and infected plants) and even household organic waste, including used tea and coffee, can be added to the compost heap.
The share of coffee in the compost heap should not exceed 10-15%. However, it is difficult to exceed this ratio, since there are hardly so many coffee grounds on the farm. In addition to the sleeping grounds, even paper filters used for brewing a drink can be thrown into the compost heap. They will rot along with the rest of the organic matter.
Soil mulching with coffee grounds
Coffee grounds are sometimes used as mulch. (Mulch is a material that is used to cover the surface of the soil. Mulch saturates the soil with useful elements, retains moisture, preventing its evaporation, prevents the top layer of the substrate from overheating or supercooling, and reduces the number of weeds).
Coffee is quite suitable as a mulch, although there are some restrictions. For backfilling, it is necessary to take clean grounds without the admixture of sugar or milk. It should be thoroughly dried, break up lumps and seals, and only then pour it onto the surface of the soil.
[!] If you mulch the soil with sweet coffee with milk residues, a variety of pests are likely to start on the surface.
In general, mulching coffee grounds is more appropriate for open ground. Under room conditions, such a substrate can turn sour, rot or become moldy.
Coffee as a remedy for aphids, ants, slugs and other pests
Many gardeners have noticed that drinking coffee helps fight some pests. Especially ants, slugs and aphids. Of course, it is unlikely to replace full-fledged industrial insecticides, but it is quite capable of coping where there are few parasites and it is important to maintain the ecological cleanliness of the site.
The use of coffee against insects is very simple - the thick must be thoroughly dried, and then thickly sprinkled with pest-infested soil. A sharp aroma will scare away insects from flower beds and beds.
If the pests attack the plant itself (like, for example, aphids), you should prepare a coffee infusion: pour 5-6 tablespoons of sleeping coffee cake into a liter of hot water, cool, let it brew for a day. For better adhesion, add 10 g of laundry soap. Pour the resulting solution into a spray bottle, and then spray on the leaves and stems.
[!] Coffee can not only scare away pests, but also attract useful garden helpers - earthworms. They like the pleasant smell of ground beans, so the worms willingly settle in the ground, mixed with sleeping coffee grounds.
Coffee for indoor plants
It would seem like a great idea to make a cup of coffee and pour the rest into a pot with a houseplant. And the plant is good, and nothing needs to be thrown away. Actually, the idea is bad. Experienced flower growers are categorically against coffee grounds on the ground surface of home flowers.
[!] The point is that used coffee, used in this way, is an excellent breeding ground for a variety of parasites: from moths and fungus gnats to mold fungi. Of course, under such conditions, the plant will get sick and may even die.
Of course, you can feed green pets growing in the room with sleeping coffee, but you should do it wisely. Do not pour the thick on top of the ground, but mix it with the soil during plant transplantation. The recommended proportion is 1 part thick to 10 parts soil. So the coffee will be evenly distributed in the pot and will gradually give nutrients to the roots.
Another method of using coffee for domestic plants is as follows: during transshipment, arrange the bottom layer of expanded clay, and then cover it with coffee grounds for 1.5-2 cm. In this case, coffee will serve not only as top dressing, but also as additional drainage.
***
One of the popular British botanists made an experiment: he watered the plants with fresh coffee.