How to use potato growing bags


How to grow potatoes in a bag: everything you need to know

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Learning how to grow potatoes in a bag will open up a whole new world of gardening potential. An extremely easy vegetable to grow, potatoes offer a high-yield for very low output - they're a great choice if you're new to growing your own vegetables. Find out how to grow potatoes with our step-by-step guide – perfect for your vegetable garden ideas.

Potatoes are also best grown in containers due to their propensity to spread into all the soil available to their tuberous roots. They are also difficult to harvest in raised beds or borders, often leaving behind unwanted 'volunteers' that will start their own unwanted potato plant the following year.

Therefore, knowing how to grow potatoes in a bag offers one of the best options for growing your own, both in terms of ease of harvest and versatility. 'You can even have potatoes in a tiny rented plot. Grow them in a potato bag or sack and you’ll be able to move house without unearthing your sack of spuds,' says Amateur Gardening magazine's Tamsin Westhorpe.

How to grow potatoes in a bag – preparation

There are three things that you will need before starting to learn how to grow potatoes in a bag for your kitchen garden. These are: chitted seed potatoes; compost; and a bag.

Chitting potatoes helps to accelerate the growth of your potatoes. Stand the seed potatoes in egg boxes and place in a light and cool, but frost-free, place. Light is vital so a windowsill in a porch or outside in a glass greenhouse are an ideal place to place your potatoes to chit. 

'Keep an eye on your potatoes whilst they chit and wait for strong, short green shoots to appear (4-6 weeks) about 2-3cms long from the eyes of each tuber,' says plantswoman Sarah Raven , 

'If you want to maximize the size of your potatoes, rub off all but three or four of the shoots at the top end of the tuber before planting out. If you leave all the shoots intact, you’ll end up with lots of small potatoes.' Once you've got shoots, your seed potatoes are ready to plant out.

(Image credit: Getty Images)

If you're working out how to grow potatoes in a bag then you also need to think about the soil. Potatoes grow best in 'well-drained, light, deep, loose soil, high in organic matter,' says the experts at Cornell University . Potato plants also 'perform best in acid soil with pH 4.8 - 5.5'. So, by growing your potatoes in a bag, rather than a raised bed or in the garden, you can curate the perfect soil conditions for the potatoes. 

The final consideration for learning how to grow potatoes in a bag, is the bag itself. 

'The important thing is that the bags need good drainage, so with re-used plastic bags do ensure that you make lots of extra holes in the bottom,' advises Bob Flowerdew in Amateur Gardening Magazine . 'Nearly as important is that the sides must exclude light – black bags are better. Hold them up to the light, and if any comes through then try doubling up or line the bags 
with several sheets of newspaper.' 

Alternatively, purchase a dedicated potato bag that will be designed for the task. Some varieties even have a flap that helps you check on your potatoes while they're growing.

Traditional DIY method for growing potatoes in a bag

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Quick and easy way to grow potatoes in a bag

If you would like a lower-maintenance method for learning how to grow potatoes in a bag then consider opting for this alternative method from Sue Sanderson, horticulturalist at Thompson & Morgan .

(Image credit: Getty Images)

How to grow potatoes in a specific potato bag

While growing potatoes in a bag that you've repurposed is a great low-cost way to grow your own harvest of potatoes, a specialist potato grow bag can maximize the quantity and quality of your crop.

'As the roots grow and reach the side of the pot, the fabric causes the roots to stop growing, essentially killing the tips of the roots. This is called air pruning or root pruning. Roots that aren’t air pruned will instead continue to grow and circle around the containers, which leads to root-bound plants,' advises Deborah Miuccio, product research and testing coordinator at Gardener’s Supply Company . 

'Air pruned plants encourage new roots to form from the center, which is the best root structure for container grown plants. A strong root system is essential for a bountiful harvest, especially for potatoes.'

You can even get grow bags that have a sealable pocket so you can check on potato growth and readiness. 

If you opt to grow your potatoes in a specific potato bag, then you can follow which ever of the above methods works best for you. 

How to grow potatoes in a bag sustainably

If you want to make sure that your method of growing potatoes in a bag is sustainable then there are a few things to consider.

Plastic sacks – like those used to sell compost - are a great option in which to grow potatoes. Reusing the bags in this way will recycle them and give them a life beyond their original usage. They will also still be able to reused for several years.

Hessian sacks or coffee bags can also be recycled and will even biodegrade when no longer usable.

Opting for organic potato seeds and avoiding the use of chemical fertilizers or pest-control will ensure that you produce a completely organic crop.

Finally, peat-free compost is a must. Peat compost contributes to greenhouse gas levels and its harvest eradicates the habitats of rare wildlife; there have been many calls to ban it due to the environmental cost. If you want to make your gardening even more sustainable, then you can use the compost from your compost heap. Our guide to how to make compost has helpful information on this.

(Image credit: RHS/Paul Debois)

How many potatoes does it take to grow in a potato bag?

It only takes one potato to grow in a potato bag. Each chitted potato - whether a whole potato or part of a larger potato – will produce one plant. The number of chitted potatoes needed depends on the size of the bag being used. As a general rule each potato plant needs about 2.5 gallons. Therefore a 10 gallon bag will support four potatoes while a 5 gallon bag will accommodate 2 potato plants.

If you want to grow a large number of potato crops, it is best growing them in separate bags rather than one huge bag. Splitting your crop between different bags means that you can harvest them at different times so you can have a more continuous supply, rather than a sudden glut. 

How to grow potatoes in a bag in time for Christmas

'If you want to grow some potatoes in time for Christmas you best get to it, time is of the essence,' says Leslie Vincent, Horticulturalist & Gardening Expert at Atkins Garden Shop . Start planting your potatoes from mid-September to early October, for a December harvest. If you have your heart set on eating your own potatoes on Christmas Day, then stagger your planting – starting from the end of August through to the start of October.

Leslie takes you through the steps:

‘It's worth noting too that potatoes are cool weather crops and thrive best in the spring and fall, so if you miss planting them before Christmas, you can plan on planting them early and harvesting them for Easter,’ advises Shelby DeVore, animal expert, avid gardener and founder of Farminence .

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Having graduated with a first class degree in English Literature four years ago, Holly started her career as a features writer and sub-editor at Period Living magazine, Homes & Gardens' sister title. Working on Period Living brought with it insight into the complexities of owning and caring for period homes, from interior decorating through to choosing the right windows and the challenges of extending. This has led to a passion for traditional interiors, particularly the country-look. Writing for the Homes & Gardens website as a content editor, alongside regular features for Period Living and Country Homes & Interiors magazines, has enabled her to broaden her writing to incorporate her interests in gardening, wildlife and nature. 

How to grow potatoes in bags and pots: easy step-by-step guide

How to grow potatoes in bags

It’s potato planting time! If you’d like learn how to grow potatoes in bags, this guide covers everything you need to know. As well as a guide to growing potatoes in bags and pots, there’s an explanation of the different potato varieties and tips on the best potatoes to grow in containers.

Growing potatoes in bags and pots

I think it’s impossible to beat the taste of homegrown new potatoes, and they’re not difficult to grow at all.  In fact they’re a brilliant veg to grow with kids; they’re nice and chunky to handle when planting, the kids get to pile soil on them as they grow, and harvest time is basically a treasure hunt as all those lovely spuds are unearthed!

Can you grow potatoes in bags?

If you’ve got lots of room in the garden or at an allotment, you can of course grow potatoes in rows and get a really big crop, but don’t be put off if you don’t have a lot of space.  You can grow potatoes in pots and bags very successfully, and using this method is perfect for small gardens or your first efforts at grow your own.  Container grown potatoes taste just as good as those grown in the ground too.

Here’s how to grow potatoes in pots and bags.

The best potatoes to grow in bags

Before you start planting potatoes in bags, it’s worth understanding a bit about the different types you can grow.

There are three main varieties of potatoes for growing. The name of each reflects the time of year that you plant and harvest them.

What month do you plant potatoes in bags?

March is traditionally the most popular time of year to plant potatoes in pots and bags. Having said that, if you choose the right variety you can plant them in April and May and still have a crop before autumn.

How long does it take to grow potatoes in a bag?

The amount of time it takes for your potato harvest to be ready is mainly influenced by the variety of potato you choose. The weather also plays a part.

It’s really up to you which variety you choose; just decide when you’d ideally like to harvest your potatoes. Once you know this, you can work out which variety is the best option. You can also check the growing times on the bag.

If you’re planting potatoes in bags in April or May, it’s a good idea to go for a first early or second early potato variety which takes less time to grow.

Once you’ve decided which type of potato you’d like to grow, you’re ready to buy your seed potatoes.

What are seed potatoes?

Seed potatoes are potatoes that have been grown with the specific purpose of being replanted to produce a crop of potatoes. The little shoots that sprout from each potato are where the crop will develop.

It’s definitely a good idea to buy seed potatoes as opposed to potatoes which you’ve bought to eat that have sprouted, because seed potatoes are guaranteed to be free of viruses.

How to make seed potatoes sprout

It’s a good idea to let your seed potatoes sprout before you plant them. This gets the growing process started sooner, which gives you an earlier harvest and can also increase yield.

How do I encourage potatoes to sprout?

To encourage your seed potatoes to sprout, you need to put them in a cool, frost-free, light place. This is often referred to as “chitting”.

You might find that the seed potatoes you’ve bought are already sprouting. This is fine, and has actually saved you a bit of time!  If not, pop them into a plant saucer, shallow tray or old egg box until they have grown shoots.

The shoots should look nice and strong, and be reasonably short, with a green or pink colour to them. If your seed potatoes don’t get enough light they will produce long, white shoots that are more fragile.

How to grow potatoes in bags

When your seed potatoes have sprouted, you’re ready to plant.

All you need is your seed potatoes, some compost, and a potato bag.

Potato containers: a few options for growing potatoes in pots and bags

You can use any large, strong plastic bag as a potato container. For example, you can make your own potato grow bag from an empty compost bag. Bin bags are a bit too flimsy as containers for growing potatoes.

To limit the use of plastic, you can grow potatoes in hessian sacks (also known as burlap sacks), or buy specially designed *potato grow bags like the one we’ve used in the picture below.  These bags can be reused year after year; as you can probably see ours is a bit faded and battered, but it’s still going strong after a few years of use.

Growing potatoes in containers

You can also have a go at planting potatoes in a pot, if you happen to have any spare. The one *pictured below is specifically designed for growing potatoes in containers, and has an inner pot with openings that allow you to check on your crop. You don’t need anything this fancy, but it definitely makes growing potatoes in a pot more fun!

If you do use a plastic bag, make some holes in the bottom for drainage before you start.

Fill your potato grow bag about a quarter full with compost; you can roll down the top to make this easier.

How many potatoes can I plant in a bag?

The number of potatoes you can grow in a bag will vary depending on the size of bag you’re using. For the bag shown in the pictures, I plant 2-3 seed potatoes, depending on how big the potatoes are.

When planting potatoes in pots and bags, don’t be tempted to plant too many in each container. This will just make more plants compete for the same amount of nutrients, and won’t give you a bigger harvest.

How to plant potatoes in bags

Position your potatoes evenly in the bag, with the majority of their sprouting shoots pointing upwards.

Cover the potatoes with another layer of compost, then give them a thorough watering.  And that’s it!

How often do I water potatoes in a bag?

How often you need to water your potatoes in containers will depend on the weather and their location. Check them regularly, and water if the top of the soil feels dry. This is all you need to do until you see leaves appearing on the top of the compost.

Do potatoes need full sun or shade?

Potato plants grow best when they have access to plenty of daylight. A sunny spot is great, but they will also tolerate partial shade.

Earthing up potatoes

When your potatoes have produced leaves, it’s time to earth them up. This is simply adding more compost to cover them up again.  You need to do this for two reasons: to prevent the growing potatoes turning green and poisonous, and to increase your crop by encouraging more potatoes to grow on the buried stems.

Unroll the top of the bag as you add more compost. Repeat this process until you’ve almost filled your bag with compost. At this point you can leave the plants to grow and flower, but keep watering them regularly.

How do I know when my potatoes are ready to harvest?

Your potato plants will produce flowers. They are ready to harvest when the flowers start to die off.

To harvest your potatoes, pull the stem of the plant out of the compost. Gather up any potatoes that are still attached to the roots, then check the compost for any that have been left behind.

You don’t have to harvest all of your crop in one go. You can dig up a few potatoes at a time, coming back for more when you need them.

If you’d prefer to dig all your plants up in one go, that’s fine too. Just make sure you store your potatoes somewhere cool and dark until you’re ready to use them. This will keep them fresh and prevent them from sprouting. You can buy *potato storage bags which are designed specifically for this purpose, but a container with a lid or a cloth drawstring bag will work well too.

And that’s all there is to growing potatoes in bags. Follow these few easy steps, and you’ll be enjoying amazing homegrown potatoes this summer. They really do taste so much better than shop-bought!

Growing new potatoes for Christmas

New potatoes are very much a summer treat, but it’s perfectly possible to grow potatoes in containers or bags for Christmas lunch too!

The method is just the same, but for a Christmas harvest of potatoes grown in a bag you need to plant your seed potatoes in late summer. Garden centres usually have seed potatoes for sale at this time of year that are specifically suited to this project.

You will need to protect your plants and harvest from frost, so move your bags into a sheltered spot or greenhouse when temperatures start to drop.

If your potatoes are ready a bit too early, you can dig them up, re-bury them in soil, and put them in a frost-free place until you’re ready to eat them. It’s not a great idea to leave them in the ground, as they’ll be vulnerable to damage from frost, slugs and general wet conditions. You can also dig them up and store them in the fridge, or in a bag in the shed or garage, but you’ll lose some of the lovely flavour and texture this way.

If you’re interested in other ways to grow potatoes, take a look at this post on how potatoes are grown. This video also covers growing potatoes in bags:

More grow your own inspiration

For more grow your own ideas, you might like to check out these gardening posts:

10 easy vegetables to grow in pots

Quick and easy veg to grow

How to grow a windowsill herb garden

55 easy grow your own tips, ideas and resources

I’ve even got lists of potato puns and potato jokes, vegetable puns and vegetable jokes, and fruit puns and fruit jokes to get you giggling.

Are you having a go at growing potatoes in pots or bags this year? Do you have any tips on how to grow potatoes in bags or containers?

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planting technology, step-by-step instructions and other features, video

The method of growing in bags is of interest to many gardeners, since there is not always enough land to plant potatoes as well. Traditionally, this crop is cultivated in the field, far from home. Therefore, planting in a bag is an opportunity to get new potatoes next to your summer home.

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