(June) We have a beautiful hydrangea at the back of our house that is about three years
old. Since we hardly ever go into the back yard, we wanted to move it to another
area that we could see from our carport area. Could we divide that hydrangea and
leave some of it where it is now planted and plant a part in another area? If
so, when would be the best time of the year to divide it? Also, we want to
divide some Siberian iris and daylilies. When would be the best time of year to
do this?
Obviously mid June is not a great time to transplant existing shrubs, since we are about to hit our toughest growing season. Transplant season is considered November through March. You could divide the plant and move a portion in the fall, or you can wait until winter has passed, and the plant is intact, then move all or a portion in March. Daylilies and Siberian iris plants are tough perennials, and probably would suffer through and make a transplant now, but why not wait until it cools off this fall. It will be easier on the plant and you as well.