Gro-Caps Reusable Plant Covers (30 Pack) Plant Protection from Frost, Cold Weather, Garden Insects, Pesticides, Rodents & Rabbits for All Your Plants, Vegetables & Flowers. Grow Organic with Gro-Caps. Plant early. Harvest early. Harvest up to 30% more. Protects plant from garden pests, pesticides, & harsh weather such as frost, hail, snow,wind & drought. Helps maintain a warm & moist environment for early growth. Allows plant to grow organically.