Most of the popular remedies have been tested and do not work
What works
Going out with a torch at ten on a damp evening, and nematodes on a warm damp soil. Both are unglamorous and both are effective.
What does not
Copper tape, eggshells, coffee grounds, sharp sand, and wool pellets. All tested and none of them reduced damage measurably.
The honest position
You will not eliminate them. Protecting seedlings for their first three weeks is achievable; a slug-free garden is not.
