Lay down a thick layer of CARDBOARD in your raised garden beds to kill the grass. It is perfectly safe to use and will fully decompose, but not before killing any grass below it. They’ll also provide compost and food for worms. @ Home ImprovementIdeas
Epsom salt as fertilizer, pest deterrent, and seed starter. For tomatoes: Drop 1 cup epsom salt and 1 cup of granulated sugar along with a few eggshells into the hole. Also, plant Marigolds with edibles to keep pests away.