4. Good drainage is important - deep waterings, no standing water after a few hours, is your goal. If the leaves start to curl, your bamboo is not getting enough water. If the leaves stay open but the majority are yellow, the roots may be drowning and rotting. This is rare - not enough water during establishment is, by far, the most common problem. You will have to water daily for at least a month to insure the roots become established in the existing soil. Bamboos are among the easiest plants to grow so you should have no problems.