Will temperatures of 6ºC lowest at night shock my plant? they are already 4/5 weeks old and they are outsiders they are used to 10º, but this week at night those temperatures will reach the lowest of 6, should i get them inside?
Autos are likely fine with overnight at 6C but any lower and you should have them in a greenhouse or inside. Keeping the root zone comfortable is more important than the air temp so you can use a soil warming cable to make a warming table, or use a hoop greenhouse. Or just bring them inside the house on the rare cold nights. Good luck.
10c air temp and more importantly the soil temperature will slow the plant down. Not a big deal with photos that can just go until ready. Auto's though are another story. They are on a fixed schedule so anything that is not optimal will affect yield.
anywhere between 2c to 15c will probably cause stress and slow them down. It wont kill them but yeah its not good best temps are in the 20s anywhere between 22c-30c is good for optimal growth.