hi thank u for answering , my tent is 7 feet tall, my light is 400 w hps with duel bulb , i have been reading these journals for few weeks now but only joined y yesterday. i have , well on the way, 3 dutch passion ,td seeds ,for my first ever grow. got so much info from u all and been doing a dry run with tomatoes to get temps and humidity and ph right , am and pm . celler grow and been checking early hours of morning readings. my soil is called bat special and it has white stones in it, so im guessing it is high in ferts , at what size\age shall i put plants in ?..thank you again for ur help