Veg with t5 and flower with hps.

Im vegging under a T5 and was wondering when i put my babies into my flower room with hps can i set the lights to 12/12 as soon as they are in the new room or should I do a week or two 18/6 or 24/0 before i switch to 12/12 so my babies get used to the HPS. ???

1st time growing indoors with lights any help would be greatly appreciated

Willisbrow,
I've never noticed any adaptation necessary when going to HPS so I would say no. Plants tend to stretch more with HPS plus the initial stretch that always accompanies the first weeks of flowering.

So, if your plants are the height that you want when they go into the flower room...start 12/12 right away.

Estimating how tall they should be at that point is totally dependant on strain, availability of headroom/light clearance and such. It's a hassle having your plants get too tall and should be avoided.
Peace,
JD

Johndee Thanks for the quick response. I am doing the lst so i get wider shorter plants. I'm kinda limited on the height of my grow room so I'm hoping they dont get to tall on me.
Its all learning. I plan to grow the same strains next go round so hopefully I'll have a good idea on how long to veg next time.

Sure thing Willisbrow,
It's Oregon and so raining...just hanging around at my computer watching "Chuck" on Netflix. I just read a thread on an LST technique called main-lining. It produces a very nice canopy and doesn't appear to be too tricky. If you want to check it out...here's the link.

https://www.rollitup.org/subcools-old-school-organics/542308-main-lining-thread.html

Good growing,
JD