Multi-stemmed birches in square planters - disadvantage: they're deciduous so only their tracery to look at in Winter. If we planted Betula pendula 'Jacquemontii' it does however have amazing white trunks
Agave plants may feel like you’re toeing the line between garden sanctuary and cactus city, but layering with a dense, creeping plant — like this green spruce sedum — keeps things feeling lush. -- modern landscape by D-CRAIN Design and Construction
looks like "cor-ten" again. Raised bed vegetable beds like this aesthetic to you? I like the idea of using wood planks and sticking to that theme, but cor-ten is good for separating spaces into clean lines (rock from turf from ornamental grasses).