Richard, long post
I have no master plan. Honestly, I started with bare ugly dirt(new construction) and had the retaining wall built with a few boulders strewn around(now almost hidden---I have major thinning to do next year)in the bed. I started with about 2 dozen plants, then every year added more and split the established ones, scattering the colors around for a tapestry of color. I throw on some composted manure mixed with bagged dirt every spring for a new layer. that's about it. some years I sprinkle on an all purpose fertilizer, but I didn't this year.
My old reliables are:
delphiniums
native geranium
siberian iris(bearded iris rots, sigh)
Asiatic lilies---lots of these
stella doro daylily
campanula---bells, small and large
trollius--yellow globeflower, and the later orange variety
bleeding heart
anemone(these will take over)
dianthus, pinks. even the "annuals" came back this year
shrub roses and one regular rose called Winnipeg Parks which winters over pretty well
the blue plant is catmint. very hardy and blooms all summer
peonies,take about 3 years to establish
arctic scabiosa and winter asters
astilbe and artemesia and hostas
shasta daisies, lots of volunteers this year. I have no luck with rudbeckia coming back.
native ferns--lots of volunteers
climbing sweet peas and gladiolas are started from seed/corm each year, and nasturtiums.
blooming shrubs are potentilla and pink spirea
columbine and poppies and viola usually re-seed
In the rock wall I have dianthus,creeping jenny, spurge,edelweis, lamium, nasturtiums, to name a few and a lovely wildflower shooting star.
I fill-in with annuals, petunias, pansies,snapdragons,marigolds and dianthus are some of my favorites. and yes, that is broccoli near the cat's tail. I fill in here and there with it, and I have a cage of sugar snap peas just ready to pick. Those and some rhubarb and strawberries are about the only edibles. One year I planted brussel sprouts and was waiting for the first frost to sweeten them up, but the moose got the entire batch, so no more of those, although they are stunning in the garden.