24/7 lighting

Is it bad to have lights on 24/7 before it reaches height to begin flowering? If so what is a good time span for lighting and darkness before flowering?

Dude, read up at GROWFAQ.
you want to do 24/7 as long as you want to do it. IF you are limited on space and doing the SEA OF GREEN, I suggest that you do 24/7 for 2 to 4 weeks. Then go to 12/12. AND if you have lots of space, wait longer before going to 12/12.
You need to read and study more here, and give more details about your growth. Soil? Hydroponic? what kind of lights? Got any pics?

I have used both 24/7 and 18/6 for vegging and i preffer the extra growth of 24h light, that i use for the first 2 1/2 to 3 weeks (depending on growth) then 18/6 for a couple days then 12/12 . I think you will find its more of a personal thing .

Oh and i have never vegged longer than 4 weeks, i do not have dwarfed plants and get very good yields !

Thanks Joekikass!

On my most recent grow, I vegged 8 weeks,
see pics of harvest here:

https://www.rollitup.org/indoor-growing/12679-almost-7-weeks-flowering-54-a.html#post121552 girl got 4 and half feet tall too, Indica.

But, most newbie growers are doing Sea of Green and closet grows with limited space so I advise them to veg for 2 to 4 weeks or more ONLY if space allows it.