Repotting 2-3 year old cactus seedlings
I cant remember exactly when but about 3 years ago I planted lots of seeds (golden barrels, fishhook barrel, etc). I started them in little 2" plastic pots that I got off of ebay and they got crowded I divided them up and put 3-4 plants each into 4" clay pots and they did very well outside last summer. They grew a lot and now they are crowding each other out and their spines are all digging into each other.
I would say they are averaging just under1.5" in diameter. I would like to repot them again this growing season but I am not sure what size pot would be best. I still have all those 2" seedling pots which would be a nice size on top but I am not sure about them being deep enough for the roots.