what size pots should i get?

my plants are 12 days old and already out growing the 18 oz cup that there in what size pot should i put them in next should i go to the biggest and just complete the grow in that and not have to transplant or just keep working my way up?

Just go to the next pot you plan to grow and finish them in. Trans planting shocks the shit out of them at times. 2 or 3 gallon is best. If you can get grow bags then do so.

It depends on what size you will flower them, and how big you want the finished plants to be, along with other things like strain and light, etc. I flower at about 15-18 inches-- plants end up 3-4 feet tall. I use 3 gallon buckets for most of the grow.

I go by what I have done in other areas of gardening which seems to work for me. When I want to transplant to a larger pot, I pick one 3 times the size it is currently in. If need be later on before flowering, might want to transplant again. I only transplant it 3 times at the most from seedling or clones to finish. But that is just how I do it, lol. There are so many opinions and ways, you gotta find one that works for you and stick with it.

i was told a gallon per foot of plant so 3 feet 3 gallons give or take. good luck