Two things I'd suggest - one is it's a fairly long border so room to make fairly big clumps, by planting in groups of the same thing. If you have a few shrubs to give the winter interest try to make a sort of wave shape (height) rather than spacing them out like lollipops, which looks clunky. Repetition helps to make things coherent, so have one plant, (or plant form) which happens a few times along the length with variations in between. Second is I've never yet managed to plant up a large area like that and get it right first time. Plants can be moved if they grow (or fail to) in a way you weren't expecting, or if the timing of flowering doesn't quite work. So have a go, take photos through the year and in the winter have a review of what you like and what you don't and do a bit of tweaking.
Gardening on the edge of Exmoor, in Devon
“It's still magic even if you know how it's done.”
i'd make that border twice as wide before starting to plant. Most shrubs will spread far beyond that bed as it is. All sorts of white flowering shrubs to choose form, both evergreen and deciduous and a huge array of perennials so do think carefull about forms and textures of both flowers and foliage to provide contrast between rounded, hummocky plants and those with taller flower spikes.
Don't forget to allow space for bulbs- snowdrops, crocuses, daffodiles, hyacinths, tulips etc - which come in shades of white and will flower in succession from January to June if chosen well. There dying foliage needs to be left on to feed the plant for next year's flowers but good perennial choices will disguise that.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
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Second is I've never yet managed to plant up a large area like that and get it right first time. Plants can be moved if they grow (or fail to) in a way you weren't expecting, or if the timing of flowering doesn't quite work. So have a go, take photos through the year and in the winter have a review of what you like and what you don't and do a bit of tweaking.
“It's still magic even if you know how it's done.”
Don't forget to allow space for bulbs- snowdrops, crocuses, daffodiles, hyacinths, tulips etc - which come in shades of white and will flower in succession from January to June if chosen well. There dying foliage needs to be left on to feed the plant for next year's flowers but good perennial choices will disguise that.