I know that its hard to get it too cold. I had a crop in winter one time that got REALLY cold! I'm talking low 50s high 40s and my yield was BOMBIN that crop. The tops of my buds turned dark purple and it was Super Skunk again with that one and it doesn't turn purple normally. I had to run my lights at night because it droped to low 30s at night. they WILL die if they freeze. I think this info is correct, at least from my expieriance so far this is one thing I've learned. I bought my first plants last July. over the last year I've been kind of obsessed but have learned a lot and can do some awsome things with my plants. I clone my own babys and have them ready to flower in 1 month. Every now and then I run into a problem and I have to go back to Rollitup like I did so much when I started. tomarrow I will post pics of my heat stressed garden and show how the buds are still growing with ALL yellow-brown leaves. I also have some really good outdoor hydro I want to show the people on budtrader.