Set Of 5 Plant Protector Nurseries Protective cones let you plant tomatoes up to 6 weeks sooner for an earlier harvest! Water-filled nursery chambers regulate temperature, soaking up heat during the day and releasing it at night! Red in color  research shows that certain red rays reflected into a plant aids in regulating plant growth and development enhancing the ripening process! Use for tomatoes, peppers, eggplants and more. Each reusable PVC nursery measures approximately 26 x 18 when flat and 17 in diameter when opened!