My bad. When I typed Althea, I was thinking about Ardens. I want to make a hedge. Two growers told me, plant them 2-3 feet apart, and..., "chop" them any way I want. As long as they are sterile "enough", I will go for it. How sterile is it? For example, I have some elephant ears, everyone tell me they are invasive - I dug up 5 - 6 new born every month during summer season, it is really not bad.
Temperature was 103 degree today. I think they can do well in such heat if I keep them moist. Should I wait until fall?