I usually transplant from 3 gallon to a 5 gallon pot, on the day of switching to 12/12. (when I also give her the last dose of veg ferts)
Sometimes I get lazy and don't get to it till the next week, tho. Late transplanting slows growth for a week or two, but if there are no other stresses, should be fine.

Would stay away from pre-ferted soil mixes for this task, tho. Mixes like Miracle Grow or SuperSoil have too much time-released nutes that could cause problems.
Rusty Trichome Reviewed by Rusty Trichome on . Transplant ??? Help I am 2 weeks into flowering and I am worried my plants are becoming to large for their current pots. Is it ok to transplant even though im already into flowering? My current pots are only 2 gallon and these ladies have exploded since I started 12/12. Rookie mistake. I picked up some 5gallon pots, a bag of fox farm soil, tiger bloom, and big bloom. What should I do? Im worried if I transplant they may turn hermi on me Thanks Rating: 5