Depends if they should be in bigger pots or not. Are the roots coming throgh the botton of the containers? or u can check by simply taking the plant out and seeing if any root space is left.. if not, time to put into a bigger pot. The roots grow really fast especially with soil. I grow my plants with miracle growl soil. Works amazing. I also use flourescent lights. quite impressive. keep your plants posted with picutres. you can also take clones now to determin the sex. remember to cut the branch on an angel