Gardening With Kids: A First Patch That Actually Grows

The Dirt Is Half the Point

The word kindergarten means, literally, a garden of children. The German teacher who coined it in 1837 wasn't being poetic about young minds. His school had beds outside, gardening was one of the main things the children did there, and each of them was given a small plot to look after. Most of what you'll grow with a four-year-old today happens in a pot on a balcony or a square metre by the back door, not on an allotment. And the payoff is better documented than you'd expect: pooled studies of seven- to twelve-year-olds found that children who garden eat more fruit and vegetables than children who don't, with no effect at all on their weight.

What really decides whether this sticks, though, isn't the seeds. It's how long the child has to wait. A four-year-old's patience for an invisible seed runs out in about a week, and radishes are ready to pull twenty to thirty days after sowing, which is roughly the longest gap a small person will tolerate between doing a thing and getting a thing. Carrots can take seventy to a hundred and twenty days. Plenty of beginner lists for kids put carrots near the top, and I'd leave them out of the first season completely, because by the time they're ready your child has moved on to dinosaurs.

So the philosophy here is to buy less than feels responsible. A packet of radish seed, something to put it in, a block of growing medium and a can the child can carry full - that's a whole first season, and it comes to less than a pair of school shoes.

Nothing on this page costs enough to sulk about if the entire project gets abandoned by June.

Five Things, and Nothing Else

Five purchases get a child from an empty balcony to a radish on a plate. The temptation is the boxed garden kit with a cheerful little watering can and a trowel about the thickness of a teaspoon, and the people who run school garden programmes are blunt about why those fail. Children's garden tools are mostly toys. A six-year-old putting their weight on a plastic trowel in dry ground will snap it inside ten minutes, and what the child takes from that is that digging doesn't work. School coordinators buy child-sized rakes and hoes but hand out full-size adult trowels, because small hands manage those perfectly well.

What the Second Season Asks For

Everything below is for the child who got through a first harvest and came back for more. None of it makes the radishes better. What it does is stretch the hobby across the months when there's nothing to sow outside, and hand over a few more jobs a child can own outright. The common mistake at this stage is buying the expensive thing first - a grow light before a single packet has been sown, usually - and then finding the whole lot in the shed come September.

Four Things Worth Knowing Before Anyone Kneels Down

None of this is a reason not to do it. It's the short list of things worth knowing once, properly, before a child is elbow-deep in a bag of coir.

Seed is not food, and some of it is treated

Seed sold for sowing can be coated with fungicide, and that coating is often brightly coloured, which is exactly the wrong signal to send a toddler. Guidance for early-years settings is that seeds shouldn't be used with children under three at all. Over three, the rule is simple and worth repeating every single time: seeds go in the soil, not in mouths. The US Poison Control line, 1-800-222-1222, answers questions about particular plants and seeds.

Lock up anything that isn't soil

Fertiliser, any garden chemical and the sharp tools all need somewhere a child can't reach when nobody's watching. Keep products in their own containers and never decant them into a drinks bottle, because a child reads a familiar bottle as something to drink.

Skip manure entirely

Animal manure can carry organisms that make people ill, and fresh manure has no business anywhere near a bed children eat from. Composted manure is safer but not safe enough to be worth the question here. Container medium and a liquid feed do the same job without it.

Hands and feet

Wash hands before gardening as well as after. Before, because whatever is already on a child's hands ends up on the thing they're going to eat later. Closed shoes rather than sandals, and nobody eats straight off the plant without washing it, however good a radish looks in the hand. Some plants irritate skin on contact, so if a rash turns up after a session, that's usually the reason.

Why Did We Get a Pot Full of Leaves and No Radishes?

We did everything right and the roots never swelled. What happened?

You almost certainly didn't thin them. Radish seed is small and a child's instinct is to tip in a satisfying amount, so every seed germinates and the seedlings come up shoulder to shoulder. Crowded roots have nowhere to go sideways, so the plant puts everything into leaves and you get a lush green pot with nothing underneath. When the seedlings are about an inch tall, pull out enough that the survivors stand as far apart as the packet says. It feels like vandalism to a five-year-old, so give them the job of counting what's left.

Should we start the radishes off in the seed tray like everything else?

No, and this one catches almost everybody, because every other beginner guide starts seeds in trays. Radishes are a root crop, and moving a seedling disturbs the very root you're trying to grow. Extension services say plainly not to transplant them, and school garden educators say the same thing: radish seed goes straight into the container it will finish in. Save the tray for the things you genuinely do move, like peas and lettuce.

Everything looked fine on Friday and had collapsed by Sunday. Are containers just harder?

A container holds a small, fixed amount of water with nothing underneath to draw on, so in hot weather it can need watering daily, and up in the high eighties and nineties sometimes more than once a day. That's the trap in a weekend away. The second half of the problem is slower and sneakier: all that watering washes nutrients out of the bottom, so a pot that was thriving in week two is hungry by week five. A liquid feed every three or four weeks sorts it.

Do we put stones in the bottom of the pot for drainage?

No. This is the most widely repeated piece of wrong gardening advice there is, and it makes things worse rather than better. Water doesn't cross easily from a fine medium into a coarse one, so a gravel layer holds water up in the soil above it instead of letting it drain away, and the roots sit wetter than they would have. Fill the container uniformly, all the way down. Leave about an inch below the rim on a small pot so there's somewhere for the water to sit while it soaks in.

They harvested once and lost interest. Is that it?

That's the normal shape of it, and the fix is never letting the pot stand empty. Sow a short row every ten days or so instead of one long row, so something is always a week away from being pulled. Gardeners set a phone reminder for exactly this, because nobody remembers on their own. Lettuce helps too, since it can be cut and will come again rather than finishing in one go. A pot with nothing happening in it is a pot a child stops visiting.