Hi David. I am aware of the what to expect as for size of a 4 inch plant. I am talking about inconsistency of the 4 inch plants I received. This year I got a lot with one stem no branching and I spent a lot of money on big orders. I had two 4 inch plants that where actually nice but the rest where just one stem and super small.
I see what you mean now and I expect Charlie will have the definitive answer, but to my mind consistency is not what you get with Hibiscus, a 6 month old Confection Perfection [I just got one] is a lot smaller than say a 6 month old Sherlock's Mystery [which I got at the same time], and when you buy a 4 inch plant that is what you get sent, a 6 to 8 month old plant, some small some big depending on how quickly that particular cv grows, I think its the age of the plant what determines him sending it not the size.