Spray your weeds with diluted vinegar.not only will it kill them, but the plants and soil love it. Read how here, and see the before and after pictures. I just learned about this in my winter gardening class the other day and the teacher has done it for
How to get rid of snails and slugs. 101 Gardening Secrets Experts Never Tell You>You can also deter slugs by using sand or gravel around the garden. They can't move around without a moist surface. Coffee (caffeine) will kill slugs and snails.