LIGHTS!
FERTILIZER!
We use this fertilizer from Miracle Gro: https://www.amazon.com/Miracle-Gro-Water-Soluble-Purpose-Plant/dp/B000BZ8HNG/ref=asc_df_B000BZ8HNG/?tag=hyprod-20&linkCode=df0&hvadid=193150648923&hvpos=&hvnetw=g&hvrand=2463664598816265617&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9012008&hvtargid=pla-312112910356&th=1
It is water soluble and we use it to water the plants with. We fertilize once per week!
**Note on watering** Bear in mind that plants don't like to swing from dry to moist!