If you haven’t planned out your garden yet, our free UK Vegetable Garden Planner is a quick way to work out exactly what to plant and where based on your space and location.

This is a practical rundown of the gardening jobs for May in the UK not an overwhelming masterclass, just the things that genuinely make a difference this month. Work through them at your own pace and the rest of the season tends to look after itself.

Get Your Tender Plants Outside

If you’ve been nursing tomatoes, courgettes, cucumbers, or squash on a windowsill since March, May is when they finally get to go outside. The key is not to rush it. Early May still carries a frost risk in many parts of the UK, and plants that go from a warm house straight into an exposed bed often just sit there sulking for weeks.

The process you want is hardening off taking plants outside during the day and bringing them back in at night over a week or two before leaving them out permanently. It sounds fiddly but it makes a real difference. Plants that are properly hardened off establish quickly. Plants that skip that step often don’t.

From late May, once overnight temperatures are reliably above 10°C, most tender crops can go out and stay out. If you’re not sure what can go out when, What to Plant in May in the UK has the full breakdown.

Sow Directly Outside

May is one of the best months of the year for sowing directly into the ground. The soil is warm, days are long, and seeds that struggled to germinate in the cold of March will shoot up quickly now.

The crops worth getting in now are carrots, beetroot, peas (early May only the window starts to close as it warms up), French beans, runner beans, salad leaves, spinach, and spring onions. If you’re doing maincrop potatoes in the north, early May is still within the planting window too.

It’s also a great month to get flowers in the ground. Hardy annuals like nasturtiums, cornflowers, and calendula can go straight into prepared soil right now. What Flowers to Plant in May in the UK covers what to sow, what to plant out, and which flowers work best alongside vegetables.

For the full sowing guide with depths, spacing, and succession sowing advice, What to Sow in May in the UK covers everything in detail, and what to sow in July in the UK covers the later summer sowings for autumn and winter crops.

One thing worth doing with carrots and salad leaves is sowing a short row every two to three weeks rather than one big sowing all at once. It staggers the harvest and means you’re not pulling everything at the same time and wondering what to do with it all. When to Plant Carrots in the UK covers the succession sowing timing clearly.

Start Leeks and Brassicas Indoors

Not everything is about getting things outside. May is the right time to start leeks indoors or in a seedbed for planting out later in summer they’re a slow crop and if you leave it too late the timeline doesn’t work. Same goes for brassicas like kale, purple sprouting broccoli, and Brussels sprouts, which all benefit from being started now under cover and planted out in June.

These crops will be in the ground for months, so it’s worth getting the timing right from the start. When to Plant Leeks in the UK and When to Plant Brassicas in the UK cover the sowing and planting schedules in full.

Thin Your Seedlings

If you sowed carrots, beetroot, lettuce, or other direct-sown crops in April, they’re probably coming up nicely now. And they’re probably too crowded. Thinning feels brutal you’re pulling out perfectly healthy seedlings but leaving them too close together almost always means worse results for everyone. They compete for water, light, and nutrients, and none of them win.

The general rule is to thin to the spacing recommended on the packet. Do it in stages if it helps thin once when they’re small, then again a week or two later when you can see clearly which ones are strongest. When to Thin Vegetable Seedlings in the UK explains how to do it without second-guessing yourself.

Start Feeding Hungry Plants

Once plants are in active growth which by May most of them are feeding starts to matter. Tomatoes, courgettes, cucumbers, and other hungry crops benefit from a regular liquid feed once they’re established and growing. Don’t bother feeding seedlings that have just gone in the ground; give them a week or two to settle first.

The thing most people get wrong with feeding is doing too much too soon, which pushes lots of leafy growth at the expense of fruit and roots. A balanced feed at the right stage works far better than lots of feed at the wrong one. getting feeding right is worth a read before you start reaching for the bottle every week.

Deal With Slugs Before They Get Out of Hand

Slugs are at their worst in May. Mild evenings, damp soil, and rows of tender young seedlings it’s basically a slug paradise. If you’ve ever wondered why your seedlings disappeared overnight between sowing them and expecting to see them come up, this is almost certainly why.

The good news is that a bit of action early in the season is worth far more than trying to deal with the problem once it’s out of hand. Check plants after dark if you want to see what you’re dealing with. Copper tape, wool pellets, and nematodes all work without harming anything else in the garden. How to Get Rid of Slugs in the Garden covers the methods that actually make a difference.

Keep an Eye on Frost

May is a brilliant month, but it has a sting in its tail. A cold, clear night in the first two weeks of the month can still bring a ground frost, and tender plants that went outside too early are the ones that suffer. A layer of fleece over vulnerable plants is all you need it doesn’t look glamorous but it works.

If you’re not sure when your last frost date typically falls in your area, UK Last Frost Dates by Postcode is genuinely useful. And if frost is forecast when you’ve already planted out, How to Protect Vegetables from Frost in the UK covers what to do quickly.

Sort Out Your Soil Before It’s Too Late

If there are still beds that haven’t had anything done to them, May is your last real chance to improve them before the growing season is properly underway. Adding compost and working it into the top layer of soil makes a real difference to how well crops establish especially in heavy clay or light sandy ground.

You don’t need to dig everything over. In fact, minimal digging is often better. The goal is just to give the top layer some structure and organic matter before plants go in. How to Improve Garden Soil in the UK is the practical guide for this, and Best Compost for Vegetables in the UK covers what’s actually worth buying.

Water Consistently But Not Obsessively

May can be surprisingly dry in the UK, and newly sown seeds and recently planted crops both need consistent moisture to establish properly. The most common watering mistake is doing it little and often a quick splash every day that only wets the surface rather than a thorough soak less frequently that actually reaches the roots.

Water in the morning if you can, keep it off the leaves where possible, and let the soil dry out slightly between waterings rather than keeping it permanently soggy. Overwatering causes just as many problems as underwatering. How Often to Water Plants in the UK has the detail on getting this right.

FAQs

A Sensible Place to Start

May can feel overwhelming because there’s so much going on. But most of it doesn’t need to happen on day one. Work through the list steadily get tender crops hardened off and outside, keep up with sowing, deal with slugs early, and make sure things are getting enough water. That covers the essentials.

The rest feeding, soil improvement, thinning can follow as you go. Gardening in May is supposed to be enjoyable, not a race. The garden doesn’t need everything done at once. It just needs you to show up regularly and pay attention. The same monthly approach continues in June gardening jobs and August gardening jobs in the UK.

If you’re looking for a broader picture of what the whole growing season looks like, What to Do in the Garden Each Month covers the full year in the same practical style. And if you have plants ready to go outside this month, How to Harden Off Plants in the UK is one of the most important reads of May.

How to grow potatoes in the UK comes down to five simple stages: buy seed potatoes, chit them, plant into warm soil from March to May, earth up the shoots as they grow, and harvest from June onwards. That is genuinely the whole job. Potatoes are the crop I point every nervous beginner towards, because they are forgiving, they crop heavily, and there is nothing quite like tipping out that first bucket of earlies. Get the soil and the timing roughly right and the plant does the rest, which is more than can be said for most things in a vegetable garden.

Potatoes were the first thing I ever grew that made me feel like a proper gardener, back when I barely knew what I was doing on a heavy patch of Oxfordshire clay. Twenty-odd years on, they are still the crop I would tell anyone to start with. This guide walks through the whole thing, from choosing seed to storing the harvest, and points you to the more detailed pages in the potato cluster wherever you need to dig deeper.

Why Potatoes Are Such a Good Crop to Learn With

Potatoes suit the UK better than almost any other vegetable. They like our cool, damp climate, they are not fussy about warmth the way tomatoes are, and they crop reliably even in a poor summer. A few seed potatoes can turn into a genuinely useful amount of food, and the plants do most of the work themselves once they are in.

They are also brilliant for breaking in rough ground. The digging you do to plant and harvest them, plus the earthing up in between, loosens and works the soil, which is why old gardeners talk about potatoes as a cleaning crop for a new plot. If you are staring at a patch of tired lawn or weedy ground wondering where to start, a row of spuds is a fine answer, and the general principles carry over to everything else in how to get started growing veg.

The Three Types of Potato, and Why It Matters

The single most useful thing to understand at the start is that potatoes come in three groups, and the group decides when you plant and when you harvest. First earlies (look for first early seed potatoes like Rocket or Swift) are your new potatoes, planted from mid to late March and lifted small and waxy in June and July. Because they come out early, they usually dodge the blight that arrives later in summer, which makes them the safest choice for a beginner.

Second earlies follow on, planted early to mid April for a mid-summer crop, a good middle option that gives slightly larger potatoes, with second early varieties such as Charlotte among the most reliable. Maincrop are the big storing potatoes, planted mid April into early May and left in the ground the longest, giving the heavy autumn crop that fills the store for winter, and maincrop varieties reward the wait. Maincrop need the most space and patience but reward you with the most food. If you want the full timing breakdown, including regional differences, it lives in when to plant potatoes in the UK.

Chitting: Worth the Trouble for Earlies

Chitting just means letting seed potatoes sprout before you plant them. Stand them in an old egg box on a cool, bright windowsill a few weeks ahead, eyes pointing up, and let them grow short, stubby, dark green shoots. It gives them a head start, and for first earlies, where every week earlier means an earlier crop, it is genuinely worth doing.

For maincrop it matters far less and plenty of good growers skip it. The one mistake to avoid is chitting somewhere warm and dark, which gives you long, pale, brittle shoots that snap off at planting. Cool and light is the whole trick. And do buy proper seed potatoes rather than sprouting supermarket ones, which are often treated to stop them growing and can carry disease.

Soil and Where to Plant

Potatoes want an open, sunny spot and soil that drains rather than sits wet. They are not too fussy beyond that, but they do best in ground that has been improved with plenty of well-rotted organic matter, which feeds them and holds moisture without waterlogging. Dig some compost in the autumn or winter before planting and you will see the difference in the crop. My guide to improving garden soil covers how, and if your ground stays wet, sort the drainage first or grow in containers instead.

Two things to avoid. Do not plant into freshly manured ground, which can encourage scab and lush growth over good tubers. And do not fight heavy compacted soil, which potatoes hate; on bad ground, raised beds or big containers give a far better crop than a struggle with the clay. If your soil is the sticky kind that clings to your boots, soil compaction in UK gardens is worth a read.

Planting: Depth, Spacing and Timing

Plant tubers about 12cm deep with the shoots pointing up. Spacing depends on type: earlies want roughly 30cm between tubers with 45 to 60cm between rows, while maincrop need more room, around 40cm apart with 75cm between rows, because they build bigger plants. Crowding maincrop is a false economy, since the plants shade each other and the tubers stay small.

The depth matters because potatoes form on the stem above the seed tuber, not below it, which is the whole reason earthing up works later. Too shallow and the developing potatoes push up into the light and turn green, which is mildly toxic and best not eaten. As for timing, the soil overrules the calendar: it wants to be around 7 to 10C and no longer cold and sticky before you plant, which on my clay is always a couple of weeks later than the seed packet suggests.

Growing Potatoes in Containers

If you have no bed, or soil you would rather not fight, potatoes grow brilliantly in bags and large containers, and first earlies are the best type for it. A big tub or a purpose-made potato bag, a couple of seed potatoes, and you are away. The compost warms faster than open ground too, so you can often plant a little earlier.

Start with about 15cm of compost, sit the tubers on it, cover, and keep adding compost to bury the lower stems as the shoots grow, exactly like earthing up, until the container is full. The one thing containers punish is drought, because they dry out fast and a thirsty potato gives a poor, knobbly crop, so keep them well watered once growing strongly. There is more on the principles in growing vegetables in pots.

Protecting the Shoots from Frost

The tubers underground are safe enough, but the moment the shoots break the surface they are at the mercy of a cold night. A sharp frost blackens the new growth, and while the plant usually recovers by pushing out fresh shoots, it loses time and yield doing it. This is the main reason not to rush planting in a mild March.

Two things protect them: earthing up, which buries and insulates emerging shoots, and a layer of garden fleece thrown over the row when frost is forecast. Both are cheap insurance. I have gone through the options in detail in protecting potato shoots from frost, and it is worth checking your own likely frost dates with the last frost date checker before you plant.

Earthing Up as They Grow

Once the plants reach 15 to 20cm tall, draw soil up around the stems to form a ridge, leaving just the top few centimetres of leaf showing. Repeat it every couple of weeks as they grow. It sounds like a chore and it is the job that does the most for your crop, protecting shoots from late frost, stopping the tubers greening in the light, and giving the plant more buried stem to set potatoes along.

A draw hoe makes short work of it. On a small bed you can do it by hand, but your back will notice by the third row.

Watering and Feeding

Potatoes are thirsty plants, and the moment that matters most is when the tubers are forming, roughly when the plants come into flower. A good soak during that period makes a real difference to the size and number of potatoes you lift, whereas letting them dry out then gives a smaller, knobblier crop. Container potatoes especially need watching, because they dry out fast in summer.

Feeding is straightforward. If the ground was well prepared with organic matter, earlies often need nothing at all. Maincrop, in the ground longer, benefit from a balanced feed as they get going, but do not overdo the nitrogen, which pushes leafy top growth at the expense of tubers. The wider care through the season is covered in how to care for potato plants.

Diseases and Problems to Watch

Blight is the big one, the same disease that hits tomatoes, arriving on warm, wet weather in mid to late summer. It turns leaves brown and mushy and can rot the tubers, and the best defences are growing first earlies that crop before it strikes and choosing resistant varieties like Sarpo for maincrop. There is a full guide in potato blight.

Scab shows as rough patches on the skin, usually cosmetic and worse on dry, limy soil, and adding organic matter helps. Slugs are the other nuisance, tunnelling into tubers left in the ground too long, which is another reason to lift maincrop promptly. If your plants are struggling in other ways, potato plants not growing and common potato problems work through the causes.

Harvesting and Storing

Earlies are ready when the flowers open, usually about 10 to 12 weeks after planting, and the best test is to dig up one plant and see. Eat them fresh, since new potatoes do not store. Maincrop are left until the foliage yellows and dies back, then given another couple of weeks in the ground so the skins set firm before you lift them for storage.

For storing, let lifted maincrop dry off for a few hours, then keep only undamaged tubers in paper or hessian sacks somewhere cool, dark and frost-free like a shed or garage. Never store them in the light, which turns them green, or in plastic, which makes them sweat and rot. Stored well, a good maincrop crop will keep you in potatoes through much of the winter, which is the whole point of growing them.

Where Potatoes Fit in the Garden

Potatoes belong in a crop rotation, ideally following a different family and not grown on the same ground two years running, which helps keep blight and other soil problems from building up (the RHS has a good primer on rotation). They pair naturally with the rest of the main-season vegetables, and because they break in and clean the soil, they make a good first crop on new ground before you move on to fussier things.

If you are planning the wider plot around them, the vegetable planting calendar puts potatoes alongside everything else going in through spring, so you can see how the season fits together.

How to Grow Potatoes in the UK: Frequently Asked Questions

A Sensible Place to Start

If it all sounds like a lot, it really is not. Buy a bag of first earlies, chit them on a windowsill, and plant them from mid March once the soil is no longer cold and sticky. Earth them up as they grow, keep them watered when they flower, and dig your first buttery new potatoes in June. That single row teaches you almost everything, and it is nearly impossible to get badly wrong.

Once you have grown earlies, second earlies and maincrop are the same job stretched over a longer season. Potatoes are the crop I would put in front of any nervous beginner, because few things give so much back for so little skill, and the confidence you get from a good potato harvest carries into everything else you grow.