It was during the early stages of my grow. During veg is when plants can be abused but also when they need to grow due to mine being autos as well. Anytime temps get below 58 degrees (14.4 celsius?) plant growth will stop. Like a hibernation to survive maybe? I think that's what someone has said on the topic in terms of how cold it can get for growing.
Can still mess the seeds up lol... most likely that's big production type standards as well. They quote when they are able to achieve the best grow environment for that strain.
Well if temps in the grow room are going to dip that low with autos they will be alright but growth will still be slowed. Not sure on how much that can affect yield in the end but I think its extends the time to harvest. Thus why mine are going to go an extra few weeks due the the cold even though they are autos.
I dunno... when I first started reading and started my grow I had read something about that they are almost like us in terms of certain heat and cold conditions. Too hot for you then it's hot for them in the room..hand test kinda thing. Same with the cold. I took note of whenever I make a change in my room and how it affected them and learned from it. First time grower here so most the stuff I'm teeing off on are what I acquired from the mass readings I've done in the past few months.