AdvertisementThat can include placing “barriers,” like crushed eggshells, around your plants. There’s not much evidence to suggest eggshells repel slugsThe idea is simple: when you place crushed eggshells on the ground, the theory goes, it makes an uncomfortable carpet for slugs. So, they turn away from your budding blooms rather than face the sharp, stabbing sensations of crawling over broken shells. The MU team placed crushed eggshells around some lettuce (which slugs love), and found it didn’t stop them at all. And the RHS research, which took place over six weeks, found that plants “protected” by crushed eggshells didn’t fare any better than those with the smashed-up shells.

Source: Huffington Post March 13, 2026 19:14 UTC