The chaste tree is a small but eye-catching ornamental with delicate blue blossoms and multiple trunks. The chaste tree may look dainty, but once it is established it is quite drought hardy and requires very little maintenance. For the first year or so after it is planted, however, the chaste tree needs extra care. It will need to be kept moist to overcome the shock of transplantation.
Build a water ring around the new chaste tree. Create a 4-inch-high ring of soil around the tree that is just a few inches larger in circumference than the tree's drip line.
Fill the water ring with water every time you water the chaste tree. You may have to do some patch work to keep the berm intact, so keep some extra loose soil around.
Water the chaste tree whenever the top 3 to 4 inches of soil are dry (roughly once or twice weekly depending on the weather).
Level the berm and reduce the chaste tree's water supply to roughly 1 inch per week once the tree is established and has produced new growth.