When the root mass becomes too great for the container therefore limiting the potential of the plant. If there's a thick layer of roots at the bottom and around the sides of the pot, it's root bound.multi purpose compost with john innes, 600 watt hps, sorry new to this what is root bound?
They've still got a ways to go, so time will tell. And roots coming out of the drain hole means they have nowhere else to go.there is roots coming out of the drain hole so hopefully that is a good sign the tripod one is two planted together by accident all the others are very green and lush counted 14 buds on one plant would you think they will finish? i forget to mention they are autos sorry...
I had a female bagseed from mids in a 3 gal her entire life, she grew no more than 2 ft tall and just looked stunted for the majority of her life. Some strains can handle 3 gal but whatever that thing was could not.if you dont mind me asking which plants did you have in them and how big did they grow?