Water, first and by a distance
Everything else on this page is about injury. This one is about drowning, which is why it comes first.
A small child drowns in very little water, very quickly, and almost silently — there is no splashing and no shouting, which is why the idea that it would be heard from indoors is unreliable. The garden sources are a pond, a water butt, a paddling pool left out, a bucket of rainwater, a water feature, an uncovered drain.
- A pond is the one to deal with structurally rather than by vigilance. Covering it with a rigid grille that sits at or just below the surface, filling it in for a few years, or fencing it with a self-closing gate are the options that work. A decorative edging is not a barrier.
- Paddling pools get emptied and turned over after use, not left to be topped up by rain.
- Water butts need a fixed lid, and buckets get emptied rather than stacked full.
The habit worth building is scanning for standing water on the way out of the door, because it accumulates without anyone deciding to put it there.
The boundary
A garden is a secure area or it is not, and most are less secure than assumed. The things that let a child out are a gate that does not latch, a gate that latches at adult height but can be shaken open, a gap under a fence, a fence panel loose after a storm, and a side return that nobody thinks of as a route.
Self-closing gates are worth the cost because they do not depend on anybody remembering. The boundary also wants checking after rough weather, which is when panels shift and gaps appear.
Tools, machinery and chemicals
The shed and the garage hold the concentrated hazards: weedkiller, slug pellets, white spirit, fuel, sharp tools, and in many households a quantity of half-used containers nobody can identify.
A locked shed solves most of it. What matters beyond the lock is keeping garden chemicals in their original containers, because a decanted bottle has no label, no warning and no child-resistant closure — and slug pellets in particular are designed to be attractive to something that eats.
Mowers and strimmers are a separate category. A rotary mower throws stones and debris at speed, so the simplest arrangement is that children are indoors while the lawn is cut rather than watching from the edge. An idling machine does not get left unattended, and tools get put away at the end of the job rather than at the end of the day.
Plants, in proportion
This is where most garden advice loses its sense of scale. The Royal Horticultural Society's own position is that serious plant poisoning is very uncommon in the UK, and that is the right place to start, because a child nibbling a leaf is a routine event and almost never an emergency.
A small number of plants are genuinely dangerous if eaten, and they are worth knowing by sight if they are already in the garden: monkshood, deadly nightshade, foxglove, yew, lily-of-the-valley, autumn crocus, castor oil plant, false hellebore and oleander. Giant hogweed is a different problem — its sap makes skin severely sensitive to sunlight, so it burns rather than poisons.
The practical measures are modest: do not plant the worst of them where small children play, check labels when buying, keep prunings off the lawn rather than in a pile within reach, and wear gloves when weeding. Teaching a child that growing things are not food is more durable than removing every plant.
If something has been eaten, the UK route is A&E or 111, straight away, taking a sample of the plant along. Do not try to make a child sick. Older material on this subject often prints an American poison helpline number, which is no use here.
Setting up a play area
Where a corner of the garden is being given over to play, a few decisions at the start save trouble later.
- Level ground. Equipment on a slope does not sit or swing as designed, water collects, and uneven footing produces the trips.
- An impact-absorbing surface under and well beyond anything a child can fall from — bark, rubber matting or wood chip rather than grass, which compacts to something close to bare earth under a swing. The surface needs to extend past the equipment, because children do not land directly beneath it.
- Shade at one end, for the hours when the sun is strongest.
- Age-appropriate equipment, and nothing with sharp edges or finger-trapping gaps.
- A clear edge if loose surfacing is used, to keep it where it belongs and visible enough not to be a trip hazard itself.
Choosing and installing the equipment itself is a larger subject with its own standards and measurements, and is covered separately.
Fire and hot surfaces
Barbecues, fire pits, chimineas and patio heaters stay dangerously hot long after they look finished, and the usual injury happens in the hour after the adults have stopped paying attention to them. A cooling barbecue is worth treating as an active hazard until it is cold, and disposable ones are the worst of the group because they sit at ground level.
Climbing, and what not to prevent
Older advice on gardens often says not to encourage tree climbing. That is the wrong instinct. Climbing is how children develop balance, judgement of height and a sense of their own reach, and a child who has never been allowed to climb anything is not a safer child — they are a child with less practice.
The useful version is to make the landing survivable rather than to prevent the climb: clear the ground of stumps, tools and hard edges, deal with the pond, and then let them climb the tree. Removing a stump or planting around it so it is visible is a better use of an afternoon than a rule nobody will enforce.
Supervision
Being outside with a small child prevents more than any single measure, and nothing here replaces it. But the point of fixing the pond, the gate and the shed is precisely that supervision has gaps — the doorbell, the phone, the other child — and a garden that is safe when nobody is looking is the one worth having.