I cast this rectangular trough last summer in a heat wave. I had plans to sell it, then plans to use it at my garden at work, and finally admitted that, yes, I DID in fact need another planted trough in my driveway. We gardeners all know how that goes.
L-R back row: thuja occidentalis 'Teddy', phyteuma scheuchzeri (horned rampion), tsuga canadensis 'Jervis'. Front row: dianthus gratianopolitanus 'Tiny Rubies', daphne cneorum 'Blackthorn Triumph', androsace sarmentosa, and globularia cordifolia 'Julian Alps'
I planted them in a mix of roughly 25% topsoil, 50% granite grit, with sand and Turface making up the last 25%. It's mulched with a small gravel. The trough gets good sun until midday, then is mostly shaded by the slatted fence and my neighbor's house.
I have high hopes for this group. These are good plants.