My London block of flats includes a small car park with small south facing 'sliver' garden.
Underground root development is not envisaged, due to semi-surface utility services, etc.
Is a mini-rock garden feasible at our low altitude ? (SW15 6BB.) What plants - self propagating subject to climate/survival possibilities would enhance such a small area ?
Any free advice you may offer would be appreciated. Sorry if you do not offer U.K. advice.
I am Scottish retired from architecture, wife Japanese.
Thank You for any advice you may offer, Brian
You should be able to do amazing things where you are with Sempervivums.
Check out these links:
Here's a silver garden planted near San Diego. Most of these plants should so well in a raised planter bed filled with a sharp draining mix of sand and leaf mold where you are.
As far as air pollution goes, most of these things work here and we have plenty of polluted air.