Germ rate is so fucking good you know right away if you got a dudd. Over last 2 grows I'd say 94-96%. Biggest prob is keeping greenhouse cool enough, learned this very first auto grow, baked off half of my seed, lol. A cloudy spring, easy, blazing spring needs shade cloth and lots of misting. Temps in gh 45 to 85F, once they are on their way seem to really dig the heat, usually have a stiff breeze blow right through. When wind stops, gets real hot, soil surface 85. I use woven poly greenhouse fabric, on a real hot day when I come from direct sun into gh I can immediately feel the intensity moderate.