I didn't think people spray during flowering, i'm not . If you mean ever, yes I did in the first weeks. Since my A/C is broken My grow area has the same weather as outside. My A/C used to be the air into the grow area. Now I'm using a high powered fan on a window blowing air towards another fan that is blowing on the plants. Hopefully by my next grow which I should start in a week or so Ill have this sorted out.