Repel the Pests Keep slugs and aphids away from window boxes with a homemade, nonchemical pest spray. Place one peeled onion, two peeled garlic cloves, and one teaspoon cayenne pepper in the jar of a blender. Add three cups of water, and blend until smooth. Let the mixture sit overnight, strain the liquid into a spray bottle, and coat plants generously. The solution will keep, refrigerated in the bottle, for up to one week.
These copper bands are one of the best, non-harmful slug repellants around. Slugs and snails hate copper because it causes a harmless electric shock-like reaction when they come into contact with it, so they crawl away. Bend them into rings and push them into the soil at the base of your plant.
Copper tape repels slugs and creates a finished, tailored look. The tape "comes in different widths to accommodate the size wood you choose to build the raised beds," says Luna. If you use 6-inch-wide copper tale, it will give you a 2-inch lip on each side of a 2-inch top edge. A 13-foot-long roll of Copper Slug Tape (1.25 inches wide) is $9.95 from Gardeners Supply.
Penny Ball for the garden. Pennies in the garden repel slugs and make hydrangeas blue. I love this idea. It looks old and new and beautiful. I need this to keep the slugs off my strawberries! - Gardening For You
Copper kills slugs where as salt only dehydrates them, but they continue to live....Penny Ball for the garden. Pennies in the garden repel slugs and make hydrangeas blue. I love this idea. It looks old and new and beautiful.