Yes. Water well immediately after planting, and monitor watering needs for the next several weeks. Plants are unlikely to need as much water as they would if spring-planted, however, this will depend entirely on the weather you are experiencing. If it is unusually hot and dry, more water will be required. Check water up until the ground freezes, if that occurs in your area – you may need to water even into late November if rainfall is scarce. If you are not confident in your ability to gauge a plant’s water needs, consider purchasing an inexpensive moisture meter.