Superthrive Ready-to-Use Foliar Spray is a natural vitamin solution, Plant Food supplement that helps kickstart plant health from seedling through maturity. Trusted by professional farmers and growers since 1940, Superthrive is now available in a ready-to-use formula for the home gardener. Superthrive builds plant vigor with a unique plant health-promoting formula. Its easy to apply, just spray foliage every 2-3 days. For use with all stages of plant growth. All-purpose formula suitable for indoor & outdoor plants, flowers, herbs & vegetables. Enhanced with kelp. No mixing needed. Helps root development. Reduces transplant shock. Use as soon as first true seedling leaves appear.