We have found 10 plants that meet your criteria.

Stinking Gladwyn ‘Iris foetidissima’ Bright orange berries. Useful for dry shade £5.99 Buy
Crocus Special Offers
Big Blue Lily-turf ‘Liriope muscari’ Purple, wand-like flowers and evergreen foliage NOW £5.99 Buy
Catnip ‘Nepeta racemosa Walker's Low’ Long flowering period £5.99 Buy
Crocus Special Offers
Catmint ‘Nepeta x faassenii Kit Cat’ A dwarf variety with purple flowers NOW £3.99 Buy
Jerusalem Sage ‘Phlomis tuberosa Amazone’ Whorls of lilac flowers and architectural seedheads £6.99 Buy
Giant Catmint ‘Nepeta grandiflora Wild Cat’ A giant catmint with deep purple-blue flowers £5.99 Buy
Lesser Periwinkle ‘Vinca minor Atropurpurea’ Delicious dark damson-purple flowers £5.99 Buy
Price Pruned
Sweet Violet ‘Viola odorata’ Sweetly fragrant flowers NOW £4.99 Buy
Wood Violet (syn. Viola labradonica... ‘Viola riviniana Purpurea Group’ Ideal for a woodland garden £4.99 Buy
Price Pruned
Phlox ‘Phlox divaricata subsp. laphamii Chattahoochee’ Masses of lilac flowers. Perfect in partial shade NOW £5.49 coming soon