Brachychiton discolor

For the first three years after it's planted, this tree should be watered deeply but infrequently (when the top three inches of soil or so have dried). After that, the tree won't need supplemental water except in exceptionally hot and dry environments. Use drippers, emitters or a slow stream of water so that it doesn't run off; allow the water to trickle all the way down through the deepest layers of soil.

A great trick for watering street trees is to drill a 1/8-inch hole on the bottom edge of a 5-gallon bucket, then set the bucket with the hole aligned next to the tree and fill the bucket with water. Fill once for a 1-5 gallon plant, fill twice for a 7-15 gallon plant, three times for 25g or larger plants. Propping the bucket up on bricks will help it drain faster, if needed.