Verbascum blattaria var. ''Albiflorum''
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This much sought-after beauty forms a clump of basal (ground-level) rich green foliage. 1m stems of pure white flowers with purple stamens are produced from early Summer. Cut back after flowering will encourage new growth from the base. Full sun, well-drained soil that isn't too humus-rich. 1m (in flower) x 30cm approximately.