A pet-safe garden: the plants, the chemicals, and the fence line

For a lot of animals a garden is the single best feature of a home — somewhere to patrol, sniff, sunbathe and burn off energy.

It's also a space full of things a curious pet will taste, dig up or squeeze through, and the hazards are less obvious than the indoor ones because a garden feels natural and safe. They sort into three groups worth checking separately: the plants, the chemicals, and the boundary. None of the checks takes long, and together they head off most of the emergencies.

The plants

Plenty of common garden plants are toxic to pets if eaten, and a few are dangerous in small amounts.

The specifics are worth knowing rather than guessing — this site keeps a list of the plants toxic to cats and dogs, and while it's framed around houseplants, many of the same plants and their relatives grow outdoors. Lilies deserve a particular mention for cat owners: they're extraordinarily toxic to cats, to the point that pollen brushed onto the coat and then groomed off can cause fatal kidney failure, so a cat household is better off without them at all. Spring bulbs, and the parts of some ornamental plants, are also common culprits. You don't have to remove everything — most pets don't graze borders wholesale — but it's worth knowing what you have and keeping the genuinely dangerous ones out of a garden a pet uses.

Two patterns are worth carrying around instead of a memorised list. Bulbs are usually the most concentrated part of a plant, which matters because a dog that digs is going for exactly that part; plant them where digging doesn't happen, or in containers. And a plant that's harmless in the border can be dangerous on the compost heap, where mould and fermenting matter cause their own problems in a dog that raids it — a lidded bin rather than an open heap solves that in one go.

The chemicals, which are the bigger risk

The stored and sprayed products in a garden do more harm than the plants, because they're concentrated and some are actively attractive.

Slug pellets are a classic danger — some formulations are lethal and pets will eat them — so choose pet-safe alternatives and never scatter the old kind where an animal goes. Rodent bait is a common poisoning and works slowly, so a pet that has eaten it looks fine at first; a poisoned rodent is also dangerous to the cat or dog that catches it. Weedkillers, fertilisers and lawn treatments should be stored sealed and kept off until dry and watered in per the label. Cocoa mulch is worth singling out because it's made from the same beans as chocolate and is toxic for the same reason. And antifreeze, though we think of it as a winter and garage hazard, ends up in gardens too — sweet-tasting and lethal in tiny amounts.

Store all of it as you'd keep medicines from a toddler: sealed, up high or behind a door, and cleaned up immediately when spilled. The garden shed deserves the same pass as the kitchen and bathroom do in a normal round of pet-proofing.

Be wary of the neighbours' products as well, since a cat's range is much wider than your fence. Bait boxes in an alley, a slug-pelleted vegetable patch two gardens along and a freshly treated lawn are all outside your control, and the practical answer is a quiet word rather than a barrier — most people simply haven't thought about the cat that walks through.

The boundary, and the water

A fence a dog can't get through is worth more than any amount of training for a dog that likes to roam.

Walk the fence line at ground level looking for gaps a determined dog could push under or a small one could slip through, and remember that a digger works at the base and a climber or jumper defeats a low fence entirely — match the boundary to the dog you actually have. For cats a conventional fence is rarely a real boundary, and containment, if you want it, needs a proper cat-proof system rather than height alone.

Ponds and pools are the other structural hazard: an animal that falls in needs a way out, so a gentle slope, a ramp or a cover matters, and a pond can be a genuine drowning risk for a small or elderly pet.

Check the gates while you're at it, since most escapes are a gate rather than a fence. A spring closer, a bolt at the top out of a child's reach, and a second barrier between gate and street turn the delivery driver who left it ajar into an inconvenience instead of a lost dog. And walk the line again after a storm — a panel that shifted overnight is the classic way a secure garden stops being one.

Netting, tools and the smaller hazards

A handful of ordinary garden objects cause injuries far more often than the poisons do.

Loose netting over fruit and vegetables entangles cats, hedgehogs and birds, and an animal that panics in it can be badly cut; use rigid mesh or keep netting taut and well off the ground. Sharp tools left lying, a fork in the border tines-up, and a strimmer running in long grass where a hedgehog or a cat is sleeping all belong on the same list.

Then the things that go in a mouth. Cocoa and bark chips a dog will chew, small decorative stones a puppy will swallow, standing water in a bucket or an old bowl that grows bacteria, and a barbecue left greasy and warm at the end of an evening — the last of those is one of the commoner reasons a dog spends a summer night at the vet. Sweetcorn cobs and kebab skewers from an outdoor meal are worse still, because both routinely need surgery to remove.

Designing it to work

Beyond removing hazards, a little planning makes a garden both safer and better for a pet.

Shade and fresh water for a hot day, a patrol route around the edge that most dogs will naturally adopt, and a screened-off area for anything you'd rather they left alone all help. A digging pit filled with loose earth or sand, in a corner where digging is fine, redirects a determined digger better than any amount of telling off, and a raised bed puts the vegetables where a dog isn't walking through them.

Think of it as the outdoor half of pet-proofing the house: the same instinct of getting down to the animal's level and seeing what it will find, applied to the space where it'll spend a good part of its life.