We have found 25 plants that meet your criteria.

Bugbane (syn. Cimicifuga) ‘Actaea simplex Atropurpurea Group’ A late-flowering perennial for shade £8.99 Buy
Price Pruned
Bugbane (syn. Cimicifuga) ‘Actaea simplex Brunette’ Tall, dramatic flower spikes in early autumn NOW £12.99 Buy
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White Wood Aster ‘Aster divaricatus’ Glorious starry white flowers NOW £5.49 Buy
Flat-topped Aster ‘Aster umbellatus’ Masses of small white flowers from late summer £5.99 Buy
Price Pruned
Bellflower ‘Campanula poscharskyana E H Frost’ Groundcover with white flowers NOW £4.99 Buy
White Snakeroot ‘Eupatorium rugosum Chocolate’ A late-flowering perennial with lovely, dark foliage £5.99 Buy
Gaura ‘Gaura lindheimeri’ White, star-shaped flowers and long season £5.49 Buy
Bergamot ‘Monarda Schneewittchen (syn. Snow Maiden)’ Whorls of wonderful, white flowers £5.99 Buy
Bistorta ‘Persicaria amplexicaulis Alba’ Elegant spikes of white flowers. This plant loves wet soil! £5.99 Buy
Price Pruned
Perennial Phlox (syn. Fujiyama)... ‘Phlox paniculata Mount Fuji’ Fragrant, small, starry white flowers NOW £5.49 Buy
Price Pruned
Culver's Root ‘Veronicastrum virginicum Album’ Slender spires of white flowers NOW £5.99 Buy
Bugbane (Cimicifuga) ‘Actaea matsumurae White Pearl’ Lights up a shady area in autumn £5.99 Buy
Price Pruned
Sowbread ‘Cyclamen hederifolium f. albiflorum’ Pure white flowers and beautiful leaves NOW £3.99 Buy
Wild Bleeding Heart ‘Dicentra formosa Aurora’ Arching stems of creamy-white flowers £6.99 Buy
Gaura ‘Gaura lindheimeri Whirling Butterflies’ Long-lasting, white flowers. Copes with drought £5.49 Buy
Rock Cranesbill ‘Geranium macrorrhizum Album’ White flowers. Perfect for suppressing weeds £5.99 Buy
Daisy ‘Leucanthemella serotina’ Cheeful, sturdy white daisies in autumn £5.49 Buy
Shasta Daisy ‘Leucanthemum Silver Princess’ Elegant single white flowers £5.49 Buy
Shasta Daisy ‘Leucanthemum x superbum Phyllis Smith’ A white daisy with unusual, ragged petals £6.99 Buy
Price Pruned
Shasta Daisy ‘Leucanthemum x superbum Snowcap’ Masses of intensely white flowers NOW £5.49 Buy