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How does coffee grounds help plants


16 Creative Uses for Used Coffee Grounds

By Kayla McDonell, RD on April 12, 2018

Coffee is a popular beverage consumed all over the world.

People usually discard the grounds left behind after it’s brewed, but after reading this article, you may reconsider throwing them out.

Coffee grounds have many practical uses around the home and garden and can even help spruce up your beauty routine.

If you don’t make a lot of coffee at home, most coffee shops have an abundance of coffee grounds that they are willing to give away.

Below are 16 creative uses for used coffee grounds.

1. Fertilize Your Garden

Most soil does not contain the essential nutrients needed for optimal plant growth.

Also, as plants grow, they absorb nutrients from the soil, ultimately leaving it depleted.

Thus, most gardens need to be fertilized to ensure that plants have the nourishment they need to survive.

Coffee grounds contain several key minerals for plant growth — nitrogen, calcium, potassium, iron, phosphorus, magnesium and chromium (1).

They may also help absorb heavy metals that can contaminate soil (2, 3).

What’s more, coffee grounds help attract worms, which are great for your garden.

To use coffee grounds as fertilizer, simply sprinkle them onto the soil surrounding your plants.

Summary Coffee grounds make great fertilizer because they contain several key nutrients required for plant growth. They can also help attract worms and decrease the concentrations of heavy metals in the soil.

2. Compost It for Later

If you do not have an immediate need for fertilizer, you can compost your coffee grounds for later use.

Composting is a natural process that turns organic items such as food scraps and yard debris into a dark, rich material called compost or humus.

Adding compost to your yard or garden can help the soil hold onto more nutrients and water, thereby improving the health of your plants.

One study found that compost made with coffee grounds and kitchen waste was richer in nutrients than compost made with waste alone (4).

Another study compared four batches of compost containing 0, 10, 20 and 40% coffee grounds.

The batch containing 40% coffee grounds produced the fewest greenhouse gas emissions and best quality compost (5).

Other items to compost include grass clippings, leaves, bark, shredded newspaper, brush, herbs, egg shells, stale bread and fruit and vegetable trimmings.

You should avoid composting meat and fish scraps, dairy products, diseased plants, grease and oils.

Summary Adding compost to your garden can significantly improve the health of your plants. Coffee grounds can help increase nutrient levels and decrease the greenhouse gas emissions of your compost.

3. Repel Insects and Pests

Certain compounds found in coffee, such caffeine and diterpenes, can be highly toxic to insects (6, 7).

Because of this, you can use coffee grounds to repel bugs.

They are effective at deterring mosquitos, fruit flies and beetles, and they may help keep other pests away too (8, 9).

To use coffee grounds as an insect and pest repellent, simply set out bowls of grounds or sprinkle them around outdoor seating areas.

You can also keep pests out of your garden by scattering coffee grounds around your plants. They help create a barrier that slugs and snails do not like to crawl over.

Summary Coffee grounds contain compounds that are toxic to many insects. You can use your coffee grounds to repel mosquitos, fruit flies, beetles and other pests.

4. Remove Fleas from Your Pet

Fleas are a common problem in household pets, and treating them can be costly and time-consuming (10).

There are several flea-removal products on the market, but many contain harsh chemicals and can produce unwanted side effects.

Luckily, fleas don’t seem to like coffee, and you may want to consider coffee grounds as a natural treatment.

Simply rub the grounds throughout your pet’s fur after shampooing. Then rinse them off and allow your pet to dry as usual.

Some say doing this may also add smoothness and shine to your pet’s coat, but there is little to no research to support either of these claims.

However, coffee grounds may be less effective than a prescription product, so if your pet has fleas and this treatment does not work, you may want to contact a vet to discuss alternative options.

Also, coffee grounds should only be used externally. They can be toxic to dogs if consumed.

Summary Like other insects, fleas do not like coffee. Bathing your pet in used coffee grounds may help keep fleas at bay.

5. Neutralize Odors

Coffee grounds contain nitrogen, which helps eliminate a foul-smelling sulfur gas from the air when it’s combined with carbon (11).

In other words, coffee grounds can help absorb and eliminate odors.

You can place a bowl of coffee grounds in your fridge or freezer to neutralize odors from spoiled or fragrant foods.

You can also fill old socks or pantyhose with coffee grounds and tie them off to make portable air fresheners.

Place these in your shoes, gym bag, bedroom drawers, under your car seat or anywhere else that may need some deodorizing.

You can even keep coffee grounds by the sink and use them to scrub your hands after chopping garlic or onions. The grounds will help remove the smell from your hands.

Summary Coffee grounds can help absorb and eliminate odors from your refrigerator, gym bag or smelly shoes. Using them as a hand scrub can also help remove lingering smells from onion or garlic.

6. Use It as a Natural Cleaning Scrub

Coffee grounds are abrasive and can help remove buildup on hard-to-clean surfaces. They may even help sanitize due to their antibacterial and antiviral properties (8).

If you like to avoid cleaning with chemicals, used coffee grounds might be worth a try.

Use them to scour your sink, polish your cookware or clean your grill.

Just be careful not to use them on any kind of porous material, as they can cause brown stains.

Summary Coffee grounds can be used as an abrasive cleaner. They can help sanitize and remove buildup from sinks, cookware, grills and other surfaces around the house.

7. Scour Your Pots and Pans

The coarse texture of coffee grounds makes them ideal for scrubbing hard-to-clean kitchen utensils.

You can use them to scrape your dishes clean and remove caked-on food from pots and pans. Simply sprinkle the grounds directly onto your pots and pans and scrub as usual. Make sure to rinse thoroughly afterward.

Summary You can use coffee grounds to scour your pots and pans. Their abrasive texture helps scrape away caked-on food.

8. Exfoliate Your Skin

The coarse particles in coffee grounds work as an exfoliating agent to help remove dirt and dead cells from the skin.

Simply mix coffee grounds with a little bit of water or coconut oil and scrub them with your hands directly onto your face and body.

Coffee grounds can also be mixed with a small amount of honey and used as an exfoliating lip scrub.

What’s more, the caffeine in coffee grounds has potent antioxidant properties that can help protect the skin from sun damage.

It can also increase blood flow, which aids in overall skin health (12).

Summary Coffee grounds can be repurposed into an exfoliating scrub for your face and body. They help remove dirt and dead skin cells and promote overall skin health.

9. Reduce the Appearance of Cellulite

Cellulite is a condition that gives the skin a dimpled, lumpy appearance. It affects 80–90% of adult women (13).

It occurs when fat deposits push through the connective tissue under your skin and is commonly seen in the buttocks and thighs.

When caffeine such as that in coffee grounds is applied topically, it may help break down this fat and increase blood flow to the area, thus decreasing the appearance of cellulite (12).

Simply mix grounds with water or coconut oil and scrub for 10 minutes twice weekly on any areas affected by cellulite.

Summary Coffee grounds may help reduce the appearance of cellulite by breaking down fat deposits and increasing blood flow to the affected area.

10. Use It as a Natural Dye

If you’ve ever spilled coffee on a white shirt, you know that it can leave a stain.

By rewetting used coffee grounds, you can create an inexpensive and all-natural dye that can be used to color cotton, rayon, cellophane, linen and paper (14).

This is an easy way to give fabrics and paper a vintage look or disguise existing stains on your clothing and towels.

Coffee grounds can even be used to dye Easter eggs or deepen the color of dark hair.

Commercial food and hair dyes can contain hundreds of chemicals, many of which may cause cancer (15, 16, 17).

Used coffee grounds make a great non-toxic alternative to traditional dyes.

If you’ve dyed a piece of fabric or yarn that will be worn or used for sewing or knitting, make sure to wash it in cold water with a very mild laundry detergent before using it.

Summary Used coffee grounds are a great natural alternative to harsh chemical dyes. Simply rewet them and use them to dye paper or fabric or darken brunette hair.

11. Clean Your Fireplace

Cleaning ashes from a wood-burning fireplace can be an incredibly messy task.

By scattering used coffee grounds over the ashes, you can weigh them down and prevent smoke clouds from forming.

This not only makes the ashes easier to remove, but it also keeps dust from escaping and traveling to other parts of the room.

Summary Use coffee grounds to weigh down the ashes in your fireplace before cleaning. This makes for easier ash removal and less mess.

12. Tenderize Meat

Meat contains muscle fibers and proteins that can give it a tough consistency.

Tenderizing meat helps break them down, resulting in a softer texture.

Salt, enzymes and acids are three natural types of meat tenderizers. Coffee contains natural acids and enzymes, making it especially effective at tenderizing meat.

The acidic nature of coffee can also help enhance the flavor of meat.

Simply add used coffee grounds to your favorite dry-rub recipe and apply the rub to the meat two hours before cooking.

The grounds will get cooked onto the meat and form a dark, crispy crust.

Alternatively, you can rebrew used grounds to make coffee, allow it to cool and use it to marinade meat in the refrigerator for up to 24 hours before cooking.

Summary Coffee grounds contain natural acids and enzymes that help tenderize meat and enhance its flavor.

13. Stimulate Hair Growth and Strip Buildup

Shampoos and styling products often leave residue behind that can dull and weigh down your hair.

Exfoliating your scalp with coffee grounds can help remove buildup and dead skin cells.

What’s more, several test-tube studies have found that caffeine, such as that in used coffee grounds, stimulates human hair growth (18, 19, 20).

Similarly, human and animal studies have found that applying caffeine to the skin increases blood flow and accelerates hair growth (12).

Before you shampoo, simply grab a handful of coffee grounds and massage them into your scalp and hair for a few minutes. Then wash and rinse as you normally would.

Do this one to two times per week, or as needed.

Summary Exfoliating your scalp with used coffee grounds can help remove dead skin cells and product buildup and may even speed up hair growth.

14. Repair Scratched Furniture

If you own wooden furniture, you’ve probably noticed it can be easily scuffed and scratched.

Various products can help minimize the appearance of scratches, but before you run to the store, you might want to give coffee grounds a try.

First, make a thick paste with used coffee grounds and water.

Then rub the paste into the scratch using a cotton swab, allow it to sit for 5–10 minutes and then wipe with a cotton rag.

This should help buff out the scratch and conceal it by dying the exposed wood a dark-brown color.

Continue to dab coffee into the scratch using a cotton swab until the desired color is achieved, waiting a few hours between applications.

Summary You can use coffee grounds to buff out scratches on wooden furniture and darken them to match your existing finish.

15. Grow Mushrooms

Mushrooms only thrive in specific conditions and are notoriously difficult to grow.

For starters, they do not grow in ordinary garden soil, as they require a substrate, or underlying substance or layer.

Used coffee grounds make a great substrate because they are packed full of nutrients that mushrooms like to grow on (21).

What’s more, they have already been sterilized during the brewing process, which would otherwise be an extra step in the growing process.

How to Grow Mushrooms in Used Coffee Grounds

  1. Collect about 5.5 pounds (2.5 kg) of grounds and moisten them using a spray bottle.
  2. Add a little over 1 pound (500 grams) of mushroom spore and sawdust mixture and mix well. You can look for this product at your local gardening store.
  3. Place resulting mixture into a filter patch grow bag, large freezer bag or bucket and fill until approximately one-half to two-thirds full.
  4. Cut four air holes, about 5 mm in size, into the sides of your container above the grounds. If you are using an open container, cover it with cellophane and poke with a few more small air holes.
  5. Lightly spray the grounds with water once daily or as needed to keep them moist.
  6. In about two to four weeks when you start to see dense white areas with little budding mushrooms, move the container to an area with lighter and fresher air.
  7. When the mushrooms become plump and their caps turn upward, you can harvest them.

You can use this method to grow just about any kind of mushroom, but shiitake and oyster varieties seem to be the easiest.

Summary When combined with adequate moisture, coffee grounds seem to be an ideal growing environment for mushrooms.

16. Treat Under-Eye Circles

The skin surrounding the eyes is extremely delicate and contains very little fat tissue. Because of this, it’s one of the first places you might see signs of aging (22).

Many things can contribute to the development of dark circles and puffiness under the eyes, including fragile blood vessels, poor circulation and inadequate skin quality (23).

Coffee grounds seem to be a promising solution due to their high antioxidant and caffeine contents.

Studies show that skin care products containing antioxidants and caffeine can help prevent the appearance of aging and reduce under-eye circles (23, 24).

In particular, caffeine has anti-inflammatory properties and stimulates blood circulation around the eyes, which can help reduce the appearance of dark circles and swelling (12, 25).

The antioxidants in coffee can also help fight free radicals, which contribute to skin aging (26).

Simply add water or coconut oil to your coffee grounds to form a paste. Apply the mixture under your eyes and let it sit for about 10 minutes before rinsing. Repeat this process daily or as needed.

Summary Coffee grounds contain caffeine and antioxidants. When applied to the skin, they can help prevent aging and reduce the appearance of dark under-eye circles and puffiness.

Are Coffee Grounds Safe to Consume?

Drinking coffee has been linked to a number of health benefits, including a decreased risk of type 2 diabetes, stroke and some types of cancer (27, 28, 29, 30).

While it may seem safe to assume that consuming coffee grounds may yield similar benefits, many doctors caution against it.

Coffee beans contain compounds called cafestol and kahweol, which can increase blood cholesterol. These compounds are typically removed by paper filters when coffee is brewed but remain in the grounds.

One study looked at the effects of consuming about 0.25 ounces (7 grams) of coffee grounds per day. After three weeks, the blood cholesterol of participants increased by an average of 26 points (31).

Some recipes for baked goods, meat rubs and sauces call for coffee grounds. Using coffee grounds this way is probably fine as long as you don’t consume them often.

Summary Coffee grounds contain compounds that can raise blood cholesterol. Consuming small amounts on occasion is fine for most people, but they may be problematic if consumed in excess.

The Bottom Line

Most people discard the grounds left behind after brewing coffee. However, there are many great ways to reuse them.

The caffeine and antioxidants in coffee grounds may help combat cellulite, under-eye circles and other signs of aging skin.

Coffee grounds are also packed with nutrients that can nourish plants and deter pests in your garden.

Furthermore, their abrasiveness makes them a great cleaning scrub around the house.

Next time you brew yourself a cup of coffee, consider repurposing the grounds using one of the ideas in this article.

Using Coffee Grounds As Fertilizer

Home › Composting › Compost Ingredients

Compost Ingredients

By: Heather Rhoades

Image by ThamKC

Whether you make your cup of coffee daily or you have noticed your local coffee house has started to put out bags of used coffee, you may be wondering about composting with coffee grounds. Are coffee grounds as fertilizer a good idea? How do coffee grounds used for gardens help or hurt? Keep reading to learn more about coffee grounds and gardening.

Composting Coffee Grounds

Composting with coffee is a great way to make use of something that would otherwise end up taking up space in a landfill. Composting coffee grounds helps to add nitrogen to your compost pile.

Composting coffee grounds is as easy as throwing the used coffee grounds onto your compost pile. Used coffee filters can be composted as well.

If you will be adding used coffee grounds to your compost pile, keep in mind that they are considered green compost material and will need to be balanced with the addition of some brown compost material.

Coffee Grounds as Fertilizer

Used coffee grounds for gardening does not end with compost. Many people choose to place coffee grounds straight onto the soil and use it as a fertilizer. The thing to keep in mind is while coffee grounds add nitrogen to your compost, they will not immediately add nitrogen to your soil.

The benefit of using coffee grounds as a fertilizer is that it adds organic material to the soil, which improves drainage, water retention, and aeration in the soil. The used coffee grounds will also help microorganisms beneficial to plant growth thrive as well as attract earthworms.

Many people feel that coffee grounds lower the pH (or raise the acid level) of soil, which is good for acid loving plants. This is only true for unwashed coffee grounds though. Fresh coffee grounds are acidic. Used coffee grounds are neutral. If you rinse your used coffee grounds, they will have a near neutral pH of 6.5 and will not affect the acid levels of the soil.

To use coffee grounds as fertilizer, work the coffee grounds into the soil around your plants. Leftover diluted coffee works well like this too.

Other Uses for Used Coffee Grounds in Gardens

Coffee grounds can also be used in your garden for other things.

Using Fresh Coffee Grounds

We get lots of questions about using fresh coffee grounds in the garden. While it’s not always recommended, it shouldn’t be a problem in some situations.

Coffee grounds and gardening go together naturally. Whether you are composting with coffee grounds or using used coffee grounds around the yard, you will find that coffee can give your garden as much of a pick me up as it does for you.

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90,000 for which plants are suitable, how to use cake and ground coffee in the garden and garden

Content:

    1. For which plants are
    2. Methods of use
      • Watering
      • Mulching
      • Supplement
      • compost
      • for soil seedlings
      • Pest protection
    3. Where not to use
    4. Helpful tips

thick as a fertilizer for indoor plants, flowers and gardens. nine0033

The answer to the question of whether coffee grounds can be used as fertilizer is obvious: of course you can! But let's take a closer look at what benefits this brings to plants.

  1. By adding coffee grounds to the soil, especially clay and loam soil, its structure becomes looser, drainage capacity and air exchange improve. In addition, coffee attracts earthworms, which also contribute to loosening the soil.
  2. The smell of coffee can repel harmful insects. He doesn't like cats either. If you sprinkle your garden beds with coffee grounds, you don't have to worry that uninvited visits from your pet will damage tender plantings. nine0008
  3. It is believed that fresh coffee has an increased level of acidity, and top dressing with such characteristics is not suitable for every plant. However, to avoid acidification of the soil, it is enough to shed thick water and then apply in the garden or vegetable garden.
  4. Coffee grounds as a fertilizer are rich in minerals and trace elements. Potassium and phosphorus contribute to good flowering and abundant fruiting. Nitrogen activates the rapid growth of plants. Copper helps to resist a number of diseases. And although the total amount of useful substances in coffee cake is about 2–3%, which means that it can hardly be considered a full-fledged fertilizer, the use of grounds as an organic plant food is fully justified. nine0008

What kind of plants is coffee fertilizer suitable for? Therefore, before you widely use it in your garden, you need to study for which plants it is most effective to use coffee grounds as a fertilizer. It is most useful for flowers that prefer a low pH level - azaleas, hydrangeas, heathers and rhododendrons. Due to the large amount of potassium in the composition, coffee grounds can be used as a fertilizer when growing vegetable crops such as tomatoes, potatoes, cucumbers, and peppers. Feeding fruit trees with sleeping coffee will also help to significantly increase their fruiting. Magnesium, which is part of coffee, is useful for berry bushes.

Magnesium and potassium will help to get a high yield of root crops, while nitrogen is indispensable for green crops. nine0033

Roses, palms, ficuses and ferns, as well as violets and asparagus, respond best to coffee fertilization. When using coffee grounds as a fertilizer for houseplants, it is recommended to shed and dry it first. If you simply pour the rest of the coffee from the cup into the pot, most likely there will be no benefit, but on the contrary, the soil may become covered with a crust and begin to mold. To prevent this, you need to mix the prepared thick with soil suitable for this type of plant. nine0033

Coffee with sugar or milk should not be used for horticultural, horticultural and flower crops, as sugar attracts ants, and milk provokes the development of putrefactive processes in the soil, which can harm the root system of plants.

Methods of use

Watering

Used coffee must be diluted with a sufficient amount of liquid before it can be used as a fertilizer for watering plants. To prepare a solution for 10 liters of water, 1 cup of grounds is required. Cake is poured with a small amount of water and left to swell for about a day. After swelling, the amount of liquid is adjusted to the calculated amount and used for watering plants. nine0033

After feeding the plants with coffee grounds, it is advisable to water the soil again, but with clean water. This technique will allow the minerals to be slowly released, nourishing the plants. When planting bushes, you should spill the ground with coffee solution at the rate of 1 liter under the bush.

Mulching

Coffee grounds can also be used for mulching crops to protect soil from drying out, repel pests and improve soil structure. However, it must be remembered that when using the grounds as mulch, as in the case of using coffee cake as a fertilizer in the garden in the country, it should be thoroughly dried to prevent the development of mold. nine0033

Soil supplement

Dormant ground coffee as a fertilizer can be added to the planting hole or hole before planting to improve soil structure. This technique makes the land more drained and loose, which ultimately has a positive effect on plant health and yield. When used on light soils, the thick acts as a binder. In this case, top dressing is applied to the upper soil layer at the rate of 200 ml per 1 m².

Compost

To speed up the maturation of the compost, it is enough to spill each layer no more than 10 cm thick with coffee infusion. Coffee grounds perform the function of nitrogen components that trigger an exothermic reaction inside the compost heap, in other words, heating it up, due to which the compost matures much faster. This method is so effective that some summer residents specifically purchase inexpensive varieties of ground coffee and sprinkle layers of compost on them.

For seedlings

Recently, the method of growing vegetable seedlings on a coffee substrate has become popular. But in order to prevent depletion of the soil, it is necessary from time to time to feed the seedlings with complex fertilizers. nine0033

Protection against pests

Coffee pomace as a fertilizer in the garden is also very effective for protecting plants from sexually mature individuals of harmful insects - ants, snails, aphids, slugs. According to the experience of some gardeners, coffee can also destroy pest larvae, in particular mosquitoes and garden bugs. This remedy is not as effective as insecticides, but also much safer.

Where not to use coffee grounds

Coffee grounds are rich in nitrogen, so if used in excess, you can burn the root system, which will lead to the death of the plant. nine0033

Poorly dried coffee waste can cause mold and fungal diseases and kill plants. In addition, coffee fertilizer is not suitable for tradescantia, asparagus, geraniums and other crops that prefer more alkaline soil. Top dressing from pomace can change the shade of rose flowers.

Helpful Hints

Dried coffee grounds are very light, so when used dry, even the slightest breeze can blow them off the garden. To prevent this from happening, it is recommended to mix the cake with earth or sawdust and close it shallowly into the soil. nine0033

If the color of the leaves of the plants has changed after treatment with coffee grounds, the use of coffee grounds as a fertilizer should be discontinued. You can carefully strain the coffee infusion and use only liquid for irrigation, and use the thick, for example, to feed conifers.

It is recommended to prepare fertilizer from coffee grounds for summer cottages, using cake from the preparation of only natural coffee. Instant powder and granulated coffee is not advisable to use for this purpose, since their nutritional value is not great. nine0033

the pros and cons of using coffee in the garden and in the garden - an article on TCHK

The advice not to throw away coffee grounds, but to take it under the tomato bush can be found in many collections of non-traditional uses of coffee. Compost, fertilizer, insecticide and soil acidifier - a variety of useful properties are attributed to this product. In fact, everything is not as simple as it seems at first glance. Below, we will look at a few of the main arguments for using coffee in the garden and see which ones should be treated with caution. nine0033

Is coffee a useful fertilizer?

There is a common belief that coffee grounds can act as an ideal natural way to feed the beds: they contain about 3% of useful micronutrients, including magnesium, potassium, calcium and phosphorus, as well as nitrogen. However, "natural" does not mean "safe" and "useful".

According to a 2016 study by Australian scientists, recommendations for using used coffee grounds either directly in the soil or as compost should be considered... anecdotal. Empirically, the Australians have found that this kind of "fertilizer" not only does not improve growth rates, but even reduces them. nine0033

Why? Looks like it's all about the caffeine. There is a lot of it even in the sleeping coffee grounds. Now raise your hand if you remember that caffeine is toxic to other non-caffeine plants. In addition, coffee grounds have antibacterial properties, which negatively affects the natural processes characteristic of composting.

However, one cannot fail to mention exceptions. According to the experience of experienced flower growers, azaleas, roses, hydrangeas and camellias respond well to such top dressing, increasing the number of buds. I like the coffee diet and evergreen shrubs, as well as ferns. nine0033

Coffee acidifies alkaline soil

One of the most common gardening tips about coffee grounds is to use them to acidify the soil. It seems to make sense: everyone knows that coffee is sour. The question is how sour the thick will be.

It turns out not very good.

Although the caffeine is still present in this product, the acid present in the grain is water soluble. Therefore, our drink becomes sour, and not the used grounds, which have a pH close to neutral (from 6.5 to 6.8 pH). nine0033

The conclusion is obvious. Coffee as an acidifier is pure myth. The used grounds practically do not have the acidic properties of the drink.

Coffee keeps pests away

Really does. After all, caffeine is toxic not only to plants, but also to insects. Scientists have already proven that coffee grounds are very effective against bugs and midges. There is a version that it also helps to drive away slugs and snails, but this hypothesis requires additional research.

Coffee is an effective soil conditioner

On the one hand, yes, the coffee grounds add some looseness. However, at the same time, its toxic properties continue to work, which means that the active use of such an additive will destroy the gardener's main friends - worms. Many Internet sources write that worms like coffee, but in reality, such a feast will have an extremely negative impact on their health. Well, then it’s easy to calculate: no worms - no natural “baking powder”.

Coffee against weeds

As we remember, caffeine inhibits plant growth.

Learn more