OVERDRIVE® Overdrive Your Plants For Their Strongest Finish During the final weeks of bloom phase your plants need the ingredients in Overdrive to maintain flower maturation, flower growth, and overall vigor. Many growers neglect the last weeks of bloom phase, but now you can kick it into Overdrive for a strong finish and get bigger smiles at harvest time. Overdrive is specially designed for use with all hydroponic growing media, including coco coir, as well as continuous liquid-feed growing systems such as aeroponics, drip irrigation and emitters, NFT, flood and drain, and deep water culture.