Eggshell barriers against slugs
A garden favourite that failed to reduce damage in an RHS trial.
Evidence: Not supported in an RHS trialProfessional review not claimed
What the sources say
An RHS trial in realistic garden conditions found no reduction in slug damage from eggshell barriers.
Evidence assessment: Not supported in an RHS trial. This describes the scope of the guidance we checked, not proof that the remedy works for you.
Cautions
- Do not rely on an eggshell ring to protect vulnerable seedlings. Slugs also play useful roles in the garden.
No method is given for this entry. The guidance we checked discourages this use or shows it does not do what tradition claims.
Ingredients & category
Sources
- Royal Horticultural Society: Slugs and snails — link and wording checked 30 September 2026
Source-checking is not clinical or veterinary review. Specific historical origin not established from the source reviewed.