I’ve stopped buying snail pellets. Two years running now, and my seedlings still make it past the four leaf stage. The trick isn’t one clever gadget, it’s a garlic spray I mix myself, plus a bit of patience about reapplying it. Here’s exactly how I do it, quantities included, so you’re not guessing.
What You Need
This is a kitchen cupboard recipe. I keep the ingredients on hand because I make a fresh batch every couple of weeks through the wet months.
- 1 whole head of garlic (not one clove, the whole bulb), crushed or roughly chopped
- 1 litre of water, plus a spare litre for diluting later
- A small pot for steeping
- A strainer or old stocking (I use a stocking, works better than a sieve for catching the pulp)
- A spray bottle, the pump kind you’d use for houseplants
- A few drops of dish soap (this is what makes the spray stick to the leaf instead of beading off)
That’s it. No mail order ingredients, nothing you can’t find at Coles or in your own garden.
How I Mix It
- Crush the garlic bulb, skins and all, and drop it into the litre of water in your pot.
- Bring it to a simmer for about ten minutes. I don’t boil it hard, just a gentle simmer so the garlic oils actually get into the water.
- Take it off the heat and let it steep overnight. This is the step people skip and it’s the one that matters most. A rushed steep gives you a weak spray.
- Strain out the pulp. You should be left with a strong, cloudy, garlic smelling liquid.
- Dilute it. I do one part garlic concentrate to nine parts water, so that litre of concentrate stretches to ten litres of usable spray.
- Add a few drops of dish soap per litre and give it a shake before every use.
In the tropics and anywhere with regular downpours, I’d steep it a day earlier than you think you need to, because the humidity means whatever you make gets used faster and doesn’t keep as well sitting in the shed. In the dry inland zones I’ve had a bottle of concentrate last three weeks in the fridge with no bother.
How And When To Use It
Spray the leaves, both sides, and the soil right around the base of the plant, in the early evening. That’s when snails and slugs start moving, so you want the smell fresh when they arrive, not baked off by midday sun.
I reapply every five to seven days, and always straight after rain, because that’s the one thing that washes it off completely. If we’ve had a proper soak overnight, I’m out there again the next evening.
One safety note before you spray a whole bed: test it on two or three leaves first and check them a day later. Garlic oil is strong and I’ve seen it mark young, tender leaves like lettuce and basil if the concentrate’s too strong. And don’t spray anything in flower during the hours bees are working it, usually mid morning to mid afternoon. Save the spraying for evening, which suits the pest timing anyway.
What It Actually Does (And Doesn’t)
I’ll be straight with you: this isn’t a wall. It’s a deterrent. Snails and slugs don’t love the smell, so they’ll graze somewhere else first if there’s a choice. It won’t stop a determined slug on a bed with nothing else growing nearby, and it does nothing for the eggs already in your soil. Pair it with picking off the ones you find at dusk, and you’ll get further than the spray alone.
If pest pressure through your zone tends to spike after certain weather, that’s exactly what the free weekly pest alert email tracks, so you know which week to actually bother spraying rather than doing it on a fixed schedule out of habit.
Give the recipe a go this week. Once you’ve made one batch you’ll never look at a snail pellet box the same way again, and the only real cost is a head of garlic and a bit of patience waiting for it to steep.
