well generally speaking u wanna be around 75-85...however plants can flower at a lot higher and lower temps then that. most of the time iv found that my room can get a little hot but i jst try to concentrate on keeping the heat as low as possible...it seems to keep the buds more compact and also it helps bring out those good colors in the end of flowering. what strains are u growing? room size? light? good luck, happy harvests!
