Hi
@Spacegenetics! Unless you're in a canicular weather with crazy hot temps and really intense sun, you can use a foliar spray during the daytime. However, don't over-do it, leaves need to breath and sweat, having a continuous wet surface might not help. In my grow room I use 3 foliar-sprays. The first one is homemade, it's a mix of water and neem-oil, it helps to prevent pests invasion. The second one is "LeafCoat" from BioBizz, it creates a thin layer over the leaves and protect them from invaders and over-sweating. The third one is made with "Alg-a-mic" from BioBizz and I only use it when the plant is suffering from stress or when my soil is "too hot" for a regular feeding. Hope this helps, keep us up-to-date and happy growing! 👊