Tree experts recommend watering and fertilizing below the soils surface, where most of the active tree roots grow. The Ross Root Feeders deep feeding system is specially designed to do exactly that. Simply connect a garden hose to the Root Feeder and insert the feed tube into the soil around the dripline of a tree. Water flows through a chamber filled with fertilizer, through a feed tube right to the trees roots. Perfect for drought weather, there is no runoff and wasted water, just healthy, beautiful trees all season. The Ross Root Feeder is available in two models, Model 102 is our economy level Root Feeder.