Adding height to these terraced beds
I'm looking to add some plants with height to these beds to compliment the existing planting. The decked area gets midday sun (it's running N-S basically) and gets shade from a hedge on the right and the screen on the left. Clay flinty soil.
On the other side of the screen I've just planted Clematis, so I'm not sure if I want another climber on this side.
I've also got a couple of very small Acers that I have eventually earmarked for here. They're currently growing very slowly in pots 😊
Really I want to get some height in. Initially I'd thought about tall perennials but I'm wondering if some small shrubs would be better?
Any sort of help much appreciated.