I agree with Greene and Shadegardener.
But ! I have one more idea ! Were they root bound? Did you scuff up outside of root ball.to expose some roots ? So they could grow into the outside soil ?
I've had people ask me why there plant died or is allmost dead ? After i ask a few questions.... I take a shovel. Dig up the plant. And the rootball looks like its still in the pot. No roots outside of ball. And the rootball is dry as a peice of popcorn !!!
and come back again !!!
