Gardeners seeking to protect their vegetables and strawberries from slugs and snails may find a free and effective solution in their kitchen: eggshells. This common waste product, when rinsed, crushed, and scattered around the base of susceptible plants, creates a natural barrier that deters these gastropod pests.
How the Eggshell Technique Works
The method relies on the sharp edges of crushed eggshells, which slugs are reluctant to crawl over. Some gardeners even leave the shells in halves to form a sizeable sharp-edged perimeter around plants, which has shown considerable effectiveness. However, after rain, the shells can become slippery, reducing their deterrent effect.
Why Slugs Are a Problem
Slugs and snails can decimate flourishing young plants within hours or overnight, reducing them to bare stems. They also eat ripe strawberries before gardeners can harvest them. While slugs serve an important ecological function as prey for birds and other animals, they can overrun outdoor spaces and cause significant damage to homegrown produce.
Alternative Natural Deterrents
The Royal Horticultural Society (RHS) recommends other natural traps. On their website, RHS reported: "Traps, such as scooped-out half orange, grapefruit, or melon skins, can be laid out cut side down or jars part-filled with beer and sunk into the soil near vulnerable plants. Check and empty these regularly, preferably every morning." These traps draw molluscs away from edible crops, allowing plants to thrive.
Biological Control Option
For those seeking a biological control method that poses no risk to other wildlife, 'Nemaslug' is an organic solution. It contains microscopic worms (nematodes) that are watered into the soil. These worms burrow into slugs' bodies and infect them with a bacteria that causes a fatal disease.
Experts caution that slug pellets, including organic options, can harm garden wildlife. Therefore, kitchen waste like eggshells and other natural methods offer safer alternatives for slug control.
