Hi All, new grow cab with MH & HPS bulb set-up. Last few were biax-floro bulbs. My question is, with an approx 3 month grow time, how long should I keep the plants on MH before switching over to HPS? Seeds are auto-fems which I usually initially grow in a computer cab with 5 floro bulbs then move to my grow cab. What can I expect moving to MH & HPS bulbs 250w? Grow cab 17"w x 30"d x 40" tall with light tube well ventilated. Only planning 2 plants. Thanks for your help.
MH & HPS bulbs auto-fem bulb switch timing
- Thread starter gromit23
- Start date
Fuzzy Duck
Well-Known Member
You can grow under MH intill the autos show preflowers & then change bulb to HPS to enhance flowering 
growingfree
New Member
Auto fem : the term auto, once sprouted the plant skips veg and she goes directly to flower so if you want a larger yield go with hps the correct spectrum of light for flowering,after all your growing for flower and when flowering you go hps. There is really no need for veg with autos. Keep it green
