Superthrive The Original Vitamin Solution for Plants 4 oz. is a highly concentrated eco-friendly and non-toxic vitamin and mineral supplement designed to promote plant growth from the inside out. This powerful solution quickly strengthens plants by building a robust root system and minimizing transplant shock. The newly added Kelp integrates seamlessly with the trusted Superthrive formula which has been enhancing plant health since 1940. Whether used alone or as part of a comprehensive fertilizer program Superthrive is ideal for both home gardeners and professionals. It is essential for maintaining healthy landscapes vegetables flowers trees and indoor plants making it a must-have for plant care.