Crop-Matron

The Crop-Matron is a machine that will apply Weed-Ex, Hydration Cells and Fertilizer as needed to all plants within a 9x9x3 area around it.

It requires 1EU/t, thus being able to run with only one Solar Panel, however you may want to use 2 Solar Panels and a BatBox as solar power will not work at night and the device does not posess internal energy storage. It only accepts as much as 32EU/t before exploding.

Weed-Ex, Fertilizer, and Hydration Cells are presumably added in the GUI or via buildcraft pipes. A plentiful supply is recommended or your crossbreeds may not live long enough to bear fruits.