Just putting together my new Windowfarm, which I’m trying to complete with as much recycled materials possible. Do I need to paint the bottles white to stop sunlight from getting to the roots? I have 4 new spray cans of paint at home, enamel in blue, black, & hunter green, and one gray primer can. I also have many cans of old wall paint lying around, as I stated, I’d like to recycle or use what’s collecting dust! Many thanks!