CX Horticulture - Regen-A-RootRegen a Root Stop root diseases from ruining your crop with Regen a Root. Regen a root keeps your plants roots healthy and also helps your plant to fight off an existing infection. Highly recommended product. How Regen a Root works Plant roots are constantly exposed to the microbes like Pythium that cause root rot. Plants that are growing strongly can usually fight off the effects of these diseases. However, during stressful situations, like