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Sisyrinchium striatum
Tufts of long, narrow leaves support slender upright spikes of yellow flowers in summer. Self-seeds freely.
Stachys byzantina 'Big Ears'
A mat-forming perennial with velvety, white-hairy green leaves producing spikes of purple flowers in summer.
Tellima grandiflora
Rosette-forming perennial bearing greenish white flowers above scalloped foliage from May to July. A particularly good plant for areas of dry shade.
Teucrium ackermannii
An evergreen perennial forming a dense mat of soft, velvety, silvery-green, aromatic foliage with clusters of fragrant, lavender-purple flowers from late spring through until early autumn.
Teucrium chamaedrys f. albiflora
A small, perennial, evergreen subshrub with toothed, dark green leaves with softly hairy undersides producing spikes of tubular, lipped, white flowers in late summer and early autumn.
Thalictrum 'Black Stockings'
A tall perennial with lacy foliage and almost black stems producing sprays of fluffy, bright purple-pink flowers in summer.
Trifolium rubens
A clump-forming perennial with blue-green foliage, producing pointed clusters of dark red-purple fowers in spring and summer.
Trollius chinensis 'Golden Queen'
An upright perennial with deeply-lobed and sharply-toothed dark green leaves with orange-yellow, bowl-shaped flowers in late spring and early summer.
Trollius x cultorum 'Alabaster'
A clump-forming perennial with deeply-divided leaves, producing very pale yellow, bowl-shaped flowers on long stems in spring.
Tulbaghia violacea
A strong-growing perennial with grey-green, strap-like foliage and bearing pale purple-pink, fragrant flowers in late summer and into early autumn.
Tulbaghia violacea 'Silver Lace' (v)
Clump-forming perennial with linear, variegated, grey-green foliage with a cream stripe producing fragrant lilac coloured flowers from summer into autumn.
Verbena bonariensis
Perennial verbena, whose clouds of vivid purple flowers are borne freely on tall, branching stems from midsummer to autumn. Ideal for mixed and herbaceous borders, and excellent for cutting.
Verbena bonariensis 'Lollipop' PBR
A shorter-growing variety of Verbena bonariensis, ideal for the front of the border, bearing airy clusters of lavender flowers in summer.
Verbena hastata
A tall perennial forming a clump of lance-shaped, pointed and toothed, dark green leaves with sturdy, branching stems producing stiff panicles of violet-blue flowers from early summer into autumn.
Verbena officinalis 'Bampton'
A bushy perennial with wiry branches of deep purple foliage producing short spikes of small, purple-pink flowers from summer into autumn.
Vinca minor f. alba
An evergreen, trailing perennial producing single white flowers from late spring right through until the autumn.
Viola sororia 'Freckles' (Vt)
A deciduous perennial with ovate leaves with white flowers in spring, speckled with violet.