Kids’ Gardening Ideas for May Half-Term 2026: 9 Quick-Win Plants & a Week-by-Week Plan

If you’re reading this on the Sunday before May half-term, you have perfect timing. May half-term 2026 runs from Monday 25 May to Friday 29 May for most English and Welsh schools, and it overlaps almost exactly with National Children’s Gardening Week (Sat 23 – Sun 31 May 2026). Garden centres across the country run free children’s events that week, and conditions in our own gardens are about as forgiving as they ever get.

I’ve grown vegetables and flowers with our own children every May half-term for the best part of two decades, on everything from a Norfolk allotment to a London balcony. Here is the honest, plant-by-plant version of what works, what flops, and how to keep them interested past Wednesday.

What you actually need (and what you don’t)

You can start with very little. A trip to almost any garden centre, supermarket or pound shop will get you everything on this list for well under £15:

• A small bag of multipurpose compost (the smallest bag is plenty for half-term).
• Three or four small pots or containers — clean yoghurt pots with a hole poked in the bottom work brilliantly.
• A few packets of seeds (see plant list below — most are under £2 a packet).
• A small watering can with a fine rose. The rose matters: a sharp pour washes seeds straight out.
• Plant labels and a pencil — old lolly sticks are perfect, and writing the date on them is half the fun.
• Optional but lovely: a child-sized trowel, a notebook for a garden diary, and a pair of gardening gloves their size.

Things you genuinely don’t need at this stage: a greenhouse, raised beds, a dedicated kids’ area, or anything heated. A bright windowsill and a doorstep are plenty.

The 9 quick-win plants

I’ve grouped these so you can pick a flower, an edible, or a rainy-day indoor option depending on the weather and the child. Each one is matched with realistic timings — what you’ll see by Sunday night, what you’ll see by the end of the school term, and when it’ll be at its peak.

Flowers

1. Sunflower (Helianthus annuus)

The classic, and still the best. Push one seed into a pot of compost about a thumb-knuckle deep, water gently, put on a sunny windowsill.

• By end of week 1: First shoot is up — usually around day 7 to 10.
• By end of school term (late July): A sturdy plant 60 cm to 1 m tall, with a flower bud forming.
• Peak: Late August. Giant varieties hit 2 m. Save the seed heads for the birds in autumn.
• Best for: Ages 3+. Great as a “tallest in the family” height competition.

2. Nasturtium (Tropaeolum majus)

The seeds are big and easy for little fingers, and the whole plant is edible — leaves taste peppery, flowers go beautifully on a salad. Plant directly into a pot or border in late May; they don’t like being moved.

• By end of week 1: Seedlings just emerging.
• By end of school term: Trailing or climbing plant covered in orange and yellow flowers.
• Peak: July to first frost. Cut the spent flowers regularly and they’ll keep going until October.
• Best for: Ages 4+. The edible-flower trick is a winner.

3. Cornflower or pot marigold

Both can be direct-sown into a sunny patch of soil at half-term and will be in flower by July. Cornflowers bring in bees; pot marigolds (calendula) are bright orange and reliably cheerful. Scatter the seeds, rake gently, water in.

• By end of week 1: Tiny seedlings (10 to 14 days, depending on weather).
• By end of school term: First flowers opening.
• Peak: July and August. Both self-seed for next year.
• Best for: Ages 4+. Excellent for a “patch of garden that’s mine” project.

Edibles

4. Radishes

The fastest vegetable a child can grow. Sow thinly straight into a pot or a strip of garden in May, water, and you’ll be eating them in around four weeks.

• By end of week 1: First seedlings up at day 4 to 7.
• By end of school term: Long since eaten — sow a second batch every fortnight.
• Time from sowing to harvest: 3 to 5 weeks.
• Best for: Ages 3+. Tip: choose a mild round variety like ‘Cherry Belle’ rather than the spicier long ones.

5. Cherry tomatoes

Buy small plug plants at the garden centre — half-term is too late to start from seed if you want fruit. A grow bag with two or three plants on a sunny patio will produce a sea of small red, orange and yellow tomatoes from late July.

• By end of week 1: Plants settled in, growing visibly.
• By end of school term: First green fruit forming.
• Peak: August and September.
• Best for: Ages 3+. Children who ‘don’t like tomatoes’ will eat their own warm off the vine. (I have seen this with our own daughter three years in a row.)

6. Peas or sugar snap peas

Peas are sturdy, fast and reliably exciting — every pod is a tiny treasure-hunt. Push the seeds into a pot or a row in the garden about 2 cm deep, 5 cm apart, and water in. They appreciate something to climb up; a few twiggy sticks are plenty.

• By end of week 1: First shoots at day 7 to 10.
• By end of school term: Flowers opening and the first tiny pods forming.
• Peak: Mid July to mid August. Pick straight off the plant; sugar snaps don’t even need cooking.
• Best for: Ages 3+. Pea-picking is one of the few garden jobs children genuinely fight to do.

Indoor back-ups for the rainy day

7. Cress

The fastest edible plant on the planet. Damp kitchen roll, a saucer or a clean yoghurt pot, a generous sprinkling of cress seed on top. Leave on the kitchen windowsill.

• Day 1: Sow.
• Day 2: Seeds split, tiny shoots visible.
• Day 6: Harvest with scissors. Make egg-and-cress sandwiches.
• Best for: Ages 2+. Sow it inside the empty shell half of a hard-boiled egg, draw a face on the shell, watch hair grow. This works every time.

8. Pea shoots

Dried marrowfat peas from the dried-goods aisle of the supermarket (the same ones used for mushy peas) cost pence and grow on a sunny windowsill into a tray of fresh, sweet shoots in two weeks. Soak overnight, scatter on damp compost, cover lightly, water.

• By end of week 1: Shoots 5 cm tall.
• By end of week 2: Ready to snip with scissors and add to salads or sandwiches.
• Best for: All ages. The cheapest meaningful gardening project there is.

9. Supermarket basil (the secret cheat)

This is the quickest gardening hack we know — one supermarket pot becomes two, three or four healthy plants in fifteen minutes, and you’ll have fresh basil on the kitchen window all summer. Most supermarket basil pots aren’t one plant: they’re forty or fifty seedlings crammed together, which is why they collapse so quickly at home. Split them apart and they thrive.

The three-step picture story (taken this morning with a fresh Waitrose pot — supermarket basil pots really have shrunk in 2026, so two healthy splits beat four feeble ones):

How to do it with the children: Buy a pot of basil from the supermarket. Tip it carefully out of the pot. With clean fingers (or a knife if the root ball is dense), divide the root block into three or four sections. A small tip from 2026: supermarket pots have got noticeably smaller this year, so don’t push your luck — two or three good splits will outperform four undernourished ones every time. Repot each piece into a larger pot with fresh multipurpose compost, water in, and stand on a sunny windowsill. By the end of May the last frosts are usually behind us in the UK, so you can also plant one or two out in a sunny, well-drained patch of garden.

• By end of week 1: Each new pot looking happier than the original supermarket pot ever did.
• By end of school term: Bushy, knee-high plants. Keep pinching out the flowering tips to encourage more leaves.
• Peak: All summer long, until first frost.
• Best for: Ages 4+. Great fine-motor work splitting the root ball.

The pay-off: get the children to try a leaf of fresh basil with a sun-warm cherry tomato — the tomato from plant #5, the basil from plant #9. Even children who say they don’t like tomatoes change their minds when the two come straight off the windowsill together. In my view, basil and a good summer cherry tomato are one of the great unbeatable kitchen pairings, and you’ve grown both of them yourselves.

Activities that aren’t just seed-sowing

Children’s attention spans for the actual sowing are short. The fun is in what surrounds it. A few activities we come back to every year:

• The sunflower height race. Each child has one pot, one seed, one plant label with their name. We measure every Sunday and keep a chart on the fridge. Whoever has the tallest sunflower by the August bank holiday picks the Sunday lunch.
• Cress face on a hard-boiled egg. Draw a face on the empty half-shell of a hard-boiled egg, sit it in an egg cup, fill with damp kitchen roll, sprinkle cress seed. Five days later your egg has hair. Then haircuts with scissors, then sandwiches.
• The bean in a jar experiment. Roll a damp paper towel inside a clear jam jar, push a runner bean seed between the paper and the glass, keep moist. Within a week the roots and shoot are clearly visible — a primary-school science lesson at the kitchen table.
• A garden diary. A cheap notebook, a few coloured pencils, a quick drawing each day of what’s happened. Surprising number of children take to this — and it makes a lovely keepsake when the seedlings are six feet tall in August.
• A pollinator patch. A square metre of bare soil, a packet of mixed bee-and-butterfly seed scattered over it, raked in, watered. By August it’ll be full of bees and the child can point them out by name.

For a wider list of garden-day activities, our gardening jobs for May piece runs through the bigger seasonal calendar, and if you have a compost heap going (or want to start one), our how to start composting this spring guide is a lovely paired project for the older children.

A day-by-day half-term plan

An hour a day for five days. Plenty of slack built in for weather and for forgetting.

Day	Activity	Time
Mon 25 May (Spring bank holiday)	Trip to the garden centre. Pick seed packets together, a small bag of compost, a few yoghurt pots. Many garden centres run free Children’s Gardening Week activities — worth checking the day’s programme.	1 hour
Tuesday	Sowing day. Sunflower in a pot, peas in a pot, radishes in a strip of garden or a wide pot, nasturtium seeds. Plant labels with names and date.	1 hour
Wednesday	Cress face on an egg shell. Start a garden diary — first drawing of the empty pots.	30 min
Thursday	Watering round, measuring (nothing to see yet, but write it down anyway). Bean-in-a-jar experiment.	30 min
Friday	First cress harvest. Egg-and-cress sandwich lunch. First sunflower shoot appearing if you’re lucky.	1 hour
Weekend	Watering, measuring, drawing. Take a photo of every pot — by August it’ll be wildly different.	15 min/day

When it (inevitably) goes wrong

It will. It always does. After many years of this here are the most common things that happen and what to do about them.

• The slugs got there first. Likely with seedlings. Sprinkle copper tape or a wide ring of crushed eggshell around the pot, or move it up off the ground onto a table. Last resort: organic slug pellets (ferric phosphate, pet-safe).
• The cat dug it up. Cover newly sown pots with a piece of chicken wire or a square of mesh until the seedlings are a few centimetres tall. Cats lose interest once there’s a real plant rather than fresh soil.
• The three-year-old keeps digging it up to “check on it”. Make a second, secret pot they don’t know about as a back-up. Then turn checking into a daily ritual — but only with the eyes.
• The seedlings have flopped over. Too much water or not enough light. Move to a brighter spot, water less. Don’t try to rescue badly damped-off seedlings — start again, you have time.
• Nothing has come up at all. Either the seeds were too deep (more than 1 to 2 cm for most things at this size) or the compost dried out. Sow again, more shallowly, and keep the top of the compost damp but not wet.
• The sunflower snapped in the wind. Heartbreaking but common with tall varieties. Stake them early — a bamboo cane and a soft tie — once they’re knee high.

Failure is, honestly, half the point. A seed that doesn’t come up is a chance to talk about why, plant another one, and try again. Children take this in their stride more easily than adults do.

Frequently asked questions

When is May half-term 2026 in the UK?

May half-term 2026 falls in the week of Monday 25 May to Friday 29 May for most English and Welsh schools, following the Spring bank holiday on Monday 25 May. Scottish and Northern Irish school dates vary — check your local authority calendar. For a wider guide to family ideas across the whole week, see our May Bank Holiday 2026: family days out and things to do.

What is the easiest plant to grow with kids in May?

Cress is the easiest of all — it germinates in two days on damp kitchen roll. For a proper garden plant, a sunflower seed in a pot of compost on a windowsill will show a shoot within seven to ten days, which is the perfect timeline for half-term.

Can we do this without a garden?

Yes. Every plant in this guide can be grown in a pot or container. A sunny windowsill, balcony, doorstep or paved patio is plenty. Cherry tomatoes, strawberries, peas, herbs and nasturtiums all thrive in containers. The only thing you can’t really do without a patch of soil is a pollinator patch — but a window box of cosmos will do almost as well.

What can children sow at the end of May for quick results?

By late May the soil is warm enough for direct sowing of radishes (ready in 4 weeks), salad leaves (3 weeks for a first cut), nasturtiums, sunflowers, runner beans, courgettes, cress and pea shoots. All can be sown straight outdoors or into pots.

When is National Children’s Gardening Week 2026?

National Children’s Gardening Week 2026 runs from Saturday 23 May to Sunday 31 May, overlapping with May half-term for most schools. Many garden centres run free family activities; childrensgardeningweek.co.uk lists what’s on near you.

How do I keep my child interested after half-term?

Give the plant a job. A sunflower has a height competition. A pea has pods to count. A strawberry has fruit to spot. A cherry tomato has a daily “is it red yet?” check. The plants that hold attention longest are the ones with an obvious finish line and something to eat at the end.

Are there any plants children shouldn’t grow?

Avoid foxgloves, lily of the valley, laburnum, yew, daphne and rhubarb leaves — all of which are toxic. As a rule, anything edible to adults is safe with children, but supervise around any plant they’re not yet certain to recognise.

Where next

• Our family’s annual runner beans children’s gardening experiment — the kind of multi-year measuring project the bean-in-a-jar leads to.
• Gardening jobs for May — the wider seasonal calendar for the grown-up gardener in the household.
• How to start composting this spring — a brilliant paired project for older children.
• Chantenay carrots and what to do with them — when your radish-and-pea success becomes a wider veg plot.
• May bank holiday 2026: family days out and things to do — for the days you want to be out of the garden.
• Our full gardening with children hub — every kids’ gardening piece we’ve ever published.

An earlier, shorter version of this piece first appeared on the blog in 2016. This is a fresh 2026 edition by Linda Garrould — rewritten end-to-end with updated UK seasonal context, an expanded nine-plant list, a day-by-day half-term plan and our own family photos.