I have two large Hibiscus syriacus: Aphrodite: 7'h x 8'w (a standard tree form with 4 main ascending branches starting 20" from ground). Red Heart: 9.5'h x 12'w (a large shrub with one main ascending trunk and a large side branch/trunk)Both are attractive and flower extravagantly, but both are also getting much too broad and tall. I chose Hibiscus syriacus because they are said to be easy to keep pruned to the size you want, but our results with the pink Aphrodite have been disappointing. Light annual pruning made little difference, so we gave it a more severe pruning (branches cut back by about 1/3) last fall. This year it is bigger than ever, but the new growth is more thin and droopy, so the plant spreads even wider and the lower branches sag in the rain. I want natural looking plants, that don't look obviously pruned, but I need to keep them narrower than their current width and prefer the original more horizontal/ascending branching pattern. Do I just need to prune much harder (eg back by 1/2 or more)? Or should I be pruning later in the fall, or in the early spring. Is there anything I can do to discourage floppy branching?