the world's most perfect fertilizer + pesticide is epsom salt. This is so true- every other week- 1 gallon of water, 1 TBSP of miracle grow and 3 TBSP of epsom salt- I promise a great garden all season.
Plants have best friends just like people do. Marigolds help tomatoes and roses grow better. Nasturtiums keep bugs away from squash and broccoli. Petunias protect beans from beetles and oregano chases them away from cucumbers. Geraniums keep Japanese beetles away from roses and corn. Chives make carrots sweeter, and basil makes tomatoes even tastier