Today I dug up some clumps of white flowered campanula (aka Cantebury Bells). One picture shows it in flower (early summer) the other as it is at this time of year. It spreads slowly in a low mat of foliage and makes strong vertical flower spikes of white bells. Fully hardy perennial in UK.
It ideally wants full sun and half decent drainage (which I don't have, but does fine anyway.)
Moves and divides easily at this time of year.
Not 100% sure what species but maybe campanula persicifolia var alba
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White campanula clump (Hatfield AL10)
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