"What kind of component do we need to take ? " was the question of the day. Amazon and internet in general became our best friends ! We decided to buy grow led thar could match the exact type of radiation the plants needed. Of course an arduino, and a lot of wires ! We also ordered humidity, temperature and light sensor ( they could be usefull ! ). For the water, we didn't exactly knew what to take so we just left it for an another day or 2 of reflexion.