How to grow potatoes

Second earlies (also called ‘new’ potatoes) take a few more weeks to mature and are harvested in July and August. These also don't store for long, so are best eaten fresh. Salad potatoes have a firm, waxy texture and many have an intense, nutty flavour. They are usually first earlies or second earlies.

Maincrop potatoes take the longest to mature and are harvested from August to October. They are suitable for baking, roasting and mashing, and can be stored for a few months.

How to grow potatoes at home

Potatoes are easy to grow – one seed potato will produce many potatoes to harvest. Prepare the soil by digging and removing weeds, and then dig straight trenches 12cm deep and 60cm apart. In spring, plant seed potatoes 30cm apart and cover them with soil to fill the trench. When the shoots reach 20cm tall, use a rake, hoe or spade to mound soil up around the bases of the shoots, covering the stems half way. This is called earthing up. You can also grow first early and second early potatoes in a large bag on a patio or balcony, covering them with compost as they grow.

More expert advice on growing potatoes:

• Potato types explained
• Grow great jacket potatoes
• 10 best salad potatoes to grow
• Maincrop potatoes to grow
• How to grow potatoes in a bag

Growing potatoes: jump links

• Planting potatoes
• Caring for potatoes
• Growing potatoes: problem-solving
• Harvesting potatoes
• Eating and storing potatoes
• Where to buy potatoes
• Potato varieties to grow

When to plant potatoes

First early potatoes can be planted from mid-March, while second earlies should be planted a couple of weeks later. Maincrop potatoes are usually planted in April and need to stay in the ground longer to produce a good crop. However, planting times vary across the country – planting in northerly areas should be delayed by a couple of weeks, depending on temperatures and risk of frost.

In warmer regions it's possible to plant a second batch of maincrop potatoes in late summer, which will yield a crop of delicious potatoes for Christmas.

How to chit potatoes

Before planting, you need to 'chit' your potatoes. This involves letting the potatoes grow shoots, which will give you a bigger potato crop. Place seed potatoes in trays or egg cartons with the end that has the most eyes uppermost. Stand in a cool, light spot until 1-2cm long shoots have formed. This could take up to six weeks.

How to plant potatoes

You can grow your own potatoes by planting out 'seed potatoes', which are small potato tubers rather than actual seeds. You can buy seed potatoes from late winter. Don't be tempted to grow potatoes from old potatoes from the veg rack, as they won't produce reliable crops.

Home-grown potatoes do well in all types of soil, but the richer the better, so dig in plenty of well-rotted organic matter, such as garden compost. An open, sunny site is best.

While maincrop potatoes grow well in the ground, early or salad potatoes will also do well in large pots and bags. Polypropylene potato growing bags are designed especially for this purpose and are handy if you're short of space. However, you can also plant potatoes in an old compost bag, with similar results.

Here, Monty explains how to grow potatoes in a bag:

When growing potatoes in the ground, plant earlies and salad types 12cm deep and 30cm apart, with 60cm between rows. Maincrop potatoes require more space to produce a decent crop. Plant them 12cm deep and 38cm apart, with 75cm between rows. Plant potatoes with the shoots (or 'eyes') facing upwards.

Watch our No Fuss video guide to planting potatoes, with Alan Titchmarsh:

Growing potatoes in a raised bed? Monty shows you how:

Growing potatoes: caring for your crop

Water potatoes regularly, especially during warm, dry spells, and keep the soil weed free. As the potato plants grow, use a spade or hoe to cover the shoots with soil to stop the developing tubers becoming green and inedible. This is called ‘earthing up’. Leave the top few centimetres poking out the top. As plants continue to grow you will need to earth them up again.

Watch Monty explain how to earth up potatoes growing in a bag:

Growing potatoes: problem-solving

Slugs can be a problem, especially if growing potatoes under black plastic.

Potato blight is a fungal disease, which turns foliage yellow with dark patches and causes the tubers to rot. Grow a blight-resistant potato variety to avoid the problem. You can also cut the potato plants down at the first sign of infection, as the fungus will not have reached the tubers by that stage. Then harvest the tubers as soon as you can.

Never grow potatoes in the same soil year after year as this could lead to a build up of pests and diseases. These include potato eelworm, which causes stunted growth and poor cropping.

When to harvest potatoes

First early potatoes are harvested in June and July, when the plants are still flowering and the potatoes are about the size of a large hen’s egg (gently rummage around in the soil to check). Cut the potato plants (also known as haulms) to the ground, then gently prise the plants out of the ground with a fork. These potatoes don't store well, so dig up the potatoes as and when you want to eat them.

Second earlies are harvested in July and August, again when the plants are still flowering. Harvest in the same way as first earlies. Again, these potatoes don't store well, so dig up them as and when you want to eat them.

Maincrop potatoes are harvested from August to October, when the leaves on the plants have turned yellow and died down. Choose a dry day to dig up your crop so that they store better. Cut the plants to the ground and dig up your potatoes, discarding any that are bruised or have been attacked by pests.

Watch Monty Don's video guide to harvesting new potatoes:

To harvest potatoes grown in pots, simply tip out the contents and enjoy the rich – and easy – pickings.

Here Monty explains how to harvest potatoes grown in a bag:

Preparing and cooking potatoes

Wash and scrub potatoes before frying, boiling, baking, mashing, roasting or sautéeing – this has to be the most versatile vegetable!

Health note: never eat potatoes raw. Green potatoes contain a chemical called solanine, which they develop when exposed to light. It can cause severe stomach upsets.

Looking for inspiration on how to use your crop? Our friends at olive have curated a delicious collection of potato recipes, including their best-ever roast potatoes.

Storing potatoes

Home-grown potatoes, particularly maincrop potatoes, will store well for many months in a cool but frost-free place. Only store perfect tubers, removing any showing signs of damage, and don’t wash them before storage. All light must be excluded to avoid potatoes turning green and poisonous. Hessian or thick brown-paper sacks are available for the job. Check crops in store regularly, removing any rotten ones.

Watch Kevin Smith explain how to prevent stored potatoes from rotting, in our Quick Tips video:

Growing potatoes: potato varieties to grow

Early potatoes:

• 'Annabelle' - compact, small tubers with white skins and golden flesh. Disease resistant.

Salad potatoes:

• 'Charlotte' - yellow skin and flesh, with a lovely flavour. Remains firm when cooked. Buy from Crocus, Thompson & Morgan and Suttons
• 'Cherie' - delicious red-skinned salad variety with waxy flesh
• 'Milva' - yellow flesh, perfect for boiling. Good yields
• 'Pink Fir Apple' - an odd shape, but good flavour. Buy from Crocus, Thompson & Morgan and Suttons

Maincrop potatoes:

• 'Blue Danube' - with purple skin and white flesh, this new variety if resistant to blight
• 'Cara' - round, waxy and drought resistant, it bakes well. Buy from Crocus, Thompson & Morgan and Suttons
• 'Isle of Jura' - an excellent all-rounder, with large crops from late summer. Disease resistant
• 'Nicola' - yellow skin and flesh, small, oval tubers, sweet flavour. Buy from Crocus, Thompson & Morgan and Suttons
• 'Setanta' - drought tolerant and great for roasting and baking

You could also try growing your own sweet potatoes, which are an excellent crop to grow in a more ornamental garden, or a conservatory. Buy from Crocus, Thompson & Morgan and Suttons