Plants, Lighting & Shabbos
If someone has plants that to grow properly they need to have specific lighting (sometimes the light on and sometimes the light off). Is one allowed to cover or uncover the lights on Shabbos?
If you are covering and uncovering the lights with the intention of helping the plants, then this is forbidden.
שש”כ כ”ו ט. שו”ת הר צבי סי’ קלג.