Shasta Daisies - Lazy Daisies by Live Mulch daisy Love them in the wood box!
Garden bench built into rendered retaining wall. I like the way trees are also in the planter to create two layers, plus a narrow planting at foot of retaining wall and under garden seat. - Gardening And Patio
Thin Planter Boxes - could use this principal along eastern/western retaining wall?