How to Grow Potatoes in the UK - A Complete Guide

Growing your own potatoes is one of the most satisfying things you can do in a UK garden. There's something genuinely special about digging into the soil and pulling out a handful of fresh, clean tubers that you've grown from a single seed potato. The flavour difference between a homegrown potato and a supermarket one is night and day - and you get to choose from varieties you'll never find on a shop shelf.

The good news is that potatoes are one of the easiest crops for beginners. They're forgiving, productive, and don't need perfect soil or constant attention. Whether you've got a full allotment, a raised bed, or just a few grow bags on a patio, you can grow a decent crop of spuds. This guide covers everything from choosing varieties through to harvesting and storing, with all the UK-specific timing you need.

Choosing the Right Potato Varieties for the UK

Potatoes are grouped by when you plant and harvest them - first earlies, second earlies, and maincrop. Getting this right is the key to a continuous supply from June right through to October.

First earlies go in from late March to early April and are ready to harvest in 10-12 weeks, usually from June. They give you the classic new potatoes - small, waxy, and thin-skinned. Popular UK varieties include Pentland Javelin, Rocket, and Swift. These are perfect if you want that first taste of homegrown potatoes early in the season.

Second earlies like Charlotte plant from early to mid-April and harvest from July. Charlotte is probably the most popular second early in the UK - it has a firm, waxy texture, excellent flavour, and works beautifully in salads. Other good second earlies include Maris Peer and Nicola.

Maincrop potatoes go in from mid-April to May and take 15-20 weeks to mature. These are your storage potatoes - they produce larger yields and the skins set properly so they keep for months. Maris Piper is the UK's favourite maincrop for roasting, while Desiree gives you red-skinned tubers with a floury texture. King Edward and Cara are also solid choices.

If you're just starting out, grab a mix of seed potato varieties from a reliable supplier. You can get a selection pack with several types so you can try different ones and see what works in your garden.

Chitting - Giving Your Potatoes a Head Start

Chitting means encouraging your seed potatoes to sprout before you plant them. It's not strictly essential - potatoes will grow without it - but it gives you a 2-3 week advantage and means your plants get away faster in the ground.

About 4-6 weeks before you plan to plant (so from late February for earlies), set your seed potatoes in a cool, bright, frost-free spot. An egg carton or shallow tray works perfectly - stand them with the rose end (the end with the most eyes) pointing up. A windowsill in a cool room, a porch, or a frost-free garage is ideal.

The sprouts should be short and stubby - about 1-2cm long. If they get long and spindly (white and leggy), the conditions are too warm or too dark. Aim for 7-10°C. Each seed potato should produce several sturdy green or purple shoots before planting time.

Buy your seed potatoes early - popular varieties sell out. Most UK garden centres stock them from January, and you can also order online for delivery at the right time for chitting.

When to Plant Potatoes in the UK

Timing depends on where you are in the UK and the weather, but here are the general windows:

• First earlies: Late March to early April (harvest June to July)
• Second earlies: Early to mid-April (harvest July to August)
• Maincrop: Mid-April to May (harvest September to October)

The soil temperature needs to be above 6°C - if it's still cold and wet, wait. A good rule of thumb is to watch for when nettles are about 15cm tall, or when daffodils are finishing flowering in your area. In southern England you can plant a couple of weeks earlier than in Scotland or northern England.

For container growing, you can start a bit earlier because the compost in grow bags warms up faster than open ground. Just cover the bags with fleece if frost is forecast.

If you want a really early crop, you can plant first early potatoes in large containers in a greenhouse or polytunnel from late February. You'll be eating new potatoes by late May.

How to Plant Potatoes - Ground, Raised Beds, and Containers

Planting in the ground

Dig a trench about 10-15cm deep. Space seed potatoes 30cm apart for earlies and 40cm for maincrop, with rows about 60-75cm apart. Place each seed potato with the sprouts pointing up and cover with soil. Add a handful of potato fertiliser to the trench for a nutrient boost.

Planting in raised beds

Same spacing as open ground but easier to manage. Raised beds warm up faster in spring, which gives you a head start. The loose soil also makes harvesting simpler - you can just pull the plants up instead of digging.

Planting in grow bags and containers

This is where most beginners start, and it works brilliantly. Use a potato grow bag or a large container (at least 30 litres per plant). Fill the bottom third with multi-purpose compost, place 2-3 seed potatoes on top, then cover with another 10cm of compost. As the stems grow, keep adding more compost - this is called earthing up and it increases your yield.

Grow bags are ideal for patios, balconies, and small gardens because they're mobile and you can move them to catch the sun. The fabric also provides good drainage and aeration for the roots. A 10-gallon bag can grow 3-4 seed potatoes comfortably.

Whatever method you choose, use fresh multi-purpose compost or well-rotted organic matter. Don't use garden soil in containers - it compacts and doesn't drain well enough.

Ongoing Care - Watering, Feeding, and Earthing Up

Watering

Potatoes need consistent moisture, especially once the tubers start forming (when the plants flower). Inconsistent watering leads to misshapen potatoes and can cause hollow heart. Aim for about 2-3cm of water per week. In containers, you'll need to water more often - daily in hot weather.

Earthing up

When the stems are about 20cm tall, draw soil up around them, covering about half the stem. Repeat every 2-3 weeks until the ridge is about 20-30cm high. This does three things: it prevents light reaching the developing tubers (which turns them green and poisonous), it encourages more tubers to form along the buried stem, and it protects the plants from late frosts.

In grow bags, earthing up means adding more compost as the stems grow, gradually filling the bag. By the time the bag is full, your potatoes are growing in deep, rich compost and the yield will be much better.

Feeding

Potatoes are hungry plants. A potato-specific fertiliser gives them the right balance of nutrients. Apply according to the packet instructions - usually a light sprinkling around the plants every 4-6 weeks. High potash feeds are ideal once the tubers start forming.

Common Potato Problems in the UK

Blight

This is the biggest threat to UK potato crops. It shows as dark patches on the leaves, often with a white fungal growth on the underside in wet weather. Blight spreads fast in warm, humid conditions - usually from July onwards. To minimise risk, choose blight-resistant varieties like Cara or Sarpo Mira, and avoid overhead watering. If blight appears, cut off and dispose of the haulm (stems and leaves) immediately, then wait 2 weeks before harvesting.

Slugs

Slugs love potatoes, especially maincrop varieties. They burrow into the tubers, leaving holes and tunnels. Use nematodes (biological control) or copper tape barriers around containers. Harvesting promptly once the skins have set also reduces slug damage.

Scab

Common scab causes rough, corky patches on the skin but doesn't affect eating quality. It's worse in dry, alkaline soils. Keeping the soil consistently moist helps prevent it.

Potato eelworm

If your potato yields decline year after year, eelworm could be the cause. Practise crop rotation - don't grow potatoes in the same spot for at least 3 years.

When and How to Harvest Potatoes

New potatoes (earlies): Start harvesting once the plants flower, usually 10-12 weeks after planting. Gently feel around in the soil or compost and take a few tubers at a time - the plant will keep producing more. Use a potato fork for ground-grown spuds to avoid spearing the tubers.

Maincrop: Wait until the haulm turns yellow and dies back (usually September to October). Cut the stems down to ground level, then wait 2 weeks before harvesting. This lets the skins set, which means they'll store much longer. Lift the whole crop on a dry day and leave them on the surface for a couple of hours to dry.

For containers and grow bags, harvesting is much easier - just tip the whole bag out onto a tarp and pick through the compost. No digging required, which is one of the big advantages of bag-growing.

Storing Your Potato Harvest

Only store potatoes that are dry, undamaged, and have set skins (the skin doesn't rub off easily). Brush off loose soil but don't wash them - dampness encourages rot during storage.

Store in paper sacks, hessian bags, or cardboard boxes in a cool (4-7°C), dark, frost-free place. A garage, shed, or cellar is ideal. Don't store them in plastic bags - they need airflow. Check regularly and remove any that start to sprout or rot.

First early varieties don't store well - eat them within a few weeks of harvest. Maincrop varieties like Maris Piper and Desiree will keep for 3-6 months in the right conditions.

Don't store potatoes with apples - the ethylene gas from the apples makes them sprout faster.

Frequently Asked Questions

Final Verdict

Growing potatoes in the UK is genuinely one of the most rewarding gardening projects you can take on. Whether you're planting a row in an allotment, a few in a raised bed, or three tubers in a grow bag on your patio, the process is simple, the crop is generous, and the taste is incomparable.

Start with a reliable variety like Charlotte or Maris Piper, get your potato fertiliser ready, and follow the timing guide above. The most common mistake beginners make is planting too early in cold soil, or failing to earth up properly - avoid those two pitfalls and you're most of the way there.

If you're growing in containers (the best option for small spaces), invest in proper grow bags with harvest windows - they make the whole process easier and you can peek at your progress without disturbing the plants. For ground growing, a good potato fork saves a lot of damaged tubers at harvest time.

One thing's for sure - once you've tasted a potato you've grown yourself, you'll never look at a supermarket bag the same way again.

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Alex Green

Alex Green writes about vegetable growing, plant care and small-space gardening for MyLushGarden.

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Last reviewed: July 30, 2026 · Evidence-based content · Contains affiliate links