In Missouri, it usually reaches a height of 4 or 5 feet. Its usually as wide as it is tall. It does not require a lot of watering. It will benefit from some mulch when planted, especially when planted in the fall and its immediate future is a seemingly unending, bitterly cold, dark winter....so, just water it when you plant it, mulch it well, and then water in the summer if it looks thirsty.