Most HTs are generally taller than they are wide because they tend to have one bloom on tall stems. So if it says 4 feet tall I'd figure on 3 feet wide as a guide line. There are some exceptions, of course, and you don't say where you are so they could be bigger if your in a very warm zone.

Thank you Seil..... I am in Florida zone 10....

Sharon, can you provide more info on Twilight Tryst? Do you like her? How does she do in the heat? Do you have any picture?

Yeah, in zone 10 things may tend to get a little larger because you have a year round growing season. But it will also depend on how far back you like to prune.

Thank you, Sharon. I was thinking about this one but afraid to order it since it was not mentioned here before. Can you post some pictures of the bloom and the bush sometime? I would love to see.