06/05/2026
Slugs are most active after dark and through wet weather — which in Britain means they're active most of the year. These methods range from immediate fixes to longer-term prevention. 🐌
1. Beer trap — bury a shallow container flush with the soil and half-fill with beer. Slugs are attracted and drown. Empty and refill every few days.
2. Wool pellets — sprinkle around vulnerable plants. The fibres deter slugs on contact and break down to feed the soil. RHS-recommended and effective even in wet conditions.
3. Diatomaceous earth — dust around plants. Abrasive when dry and effective, but loses its action when wet. Reapply after every rain — a high-maintenance option for British conditions.
4. Coffee grounds — scatter around plants as a mild deterrent. Evidence is limited at garden scale, but worth trying as a free resource if you have them.
5. Copper tape — wrap around pots or raised beds. Slugs avoid crossing it. Keep the tape clean for best results.
6. Salt — spot treatment only, directly on slugs. Never sprinkle around plants or soil. Effective but use sparingly.
7. Handpick at night — go out an hour after dark with a torch. This is the most direct method and makes a real dent in numbers quickly.
8. Nematodes — beneficial microscopic organisms watered into the soil in spring and autumn. Highly effective and wildlife-safe. Requires soil above 5°C to work.
9. Wood ash — sprinkle around plants to create an unfriendly surface. Loses effectiveness when wet — reapply after rain.
10. Sharp grit or horticultural sand — barrier around plants. Slugs dislike crossing rough dry surfaces.
11. Companion planting — marigolds, garlic, and fennel near vulnerable crops may help deter slugs. Evidence is mixed, but they add value to the garden regardless.
12. Keep the garden tidy — remove debris, fallen leaves, and dense ground cover where slugs shelter during the day.
Water in the morning so soil surface dries by evening. Use raised beds and good drainage wherever possible. Reapply all barriers after rain. 🌿
