What size pots should i use

my grow room is 1.2mx1.2mx2m im planting northern lights and purple haze.im planing to keep them in veg for month and a half and then to flower.what size containers should be enough

Start small and work your way up. Rule of thumb is 1 gallon for each foot of height. Different strains have different needs. What kind of light do you have?

600 hps in a 1.2mx1.2m x2m high,growbox is that enough

yea your 600w will do just fine for that area. i have mine in 12" diameter pots in about a .7 x 1.0 meter area so it's less than a gallon per foot but it's working ok for now, i'm thinking of moving up to a a little bigger pots soon tho

how many do u think u can fit in your space and what strain

well i'd recommend using square pots, better use of space. i LST'd mine and now that they're big and bushy barely 5 of em fit in there, but it depends on if you grow em straight up or something different.

i've got 3 different strains, Blueberry (bushiest) OG Diesel (looks kinda like a xmas tree) and Chocolate Thai (skinniest)