We have found 80 plants that meet your criteria.

Hyssop ‘Agastache Black Adder’ Distinctive violet, bottlebrush flowers £5.99 Buy
Price Pruned
Mexican Giant Hyssop ‘Agastache Blue Fortune’ Spires of lilac flowers and aromatic leaves NOW £5.49 Buy
Price Pruned
Allium ‘Allium cristophii’ Huge globes of star-like, lilac flowers NOW £5.99 Buy
Allium cristophii ‘Allium cristophii’ Huge globes of star-like, lilac flowers £5.00 Buy
Allium Schubertii ‘Allium schubertii’ The flowers look like giant fireworks £7.50 Buy
Round-headed Leek ‘Allium Sphaerocephalon’ Small, wine-coloured flowers on tall stems £4.00 Buy
Allium unifolium ‘Allium unifolium’ A longer flowering period that most Alliums £3.75 Buy
Wild Angelica ‘Angelica sylvestris Vicar's Mead’ Great for a wildflower garden £6.99 Buy
Valerie Finnis Artemisia ‘Artemisia ludoviciana Valerie Finnis’ Very drought tolerant £5.49 Buy
Bronze Fennel ‘Foeniculum vulgare Giant Bronze’ Tall perennial with feathery, bronze leaves £4.99 Buy
Price Pruned
Lavender ‘Lavandula angustifolia Melissa Lilac’ Large, lilac flowers in summer NOW £4.99 Buy
Price Pruned
Lavender ‘Lavandula angustifolia Munstead’ A compact variety with blue-purple flowers NOW £4.99 Buy
Price Pruned
Bergamot ‘Monarda Cambridge Scarlet’ A popular old variety with bright red flowers NOW £5.49 Buy
Price Pruned
Bergamot ‘Monarda Ou Charm’ Pretty, pink flowers and purple bracts NOW £5.49 Buy
Bergamot ‘Monarda Schneewittchen (syn. Snow Maiden)’ Whorls of wonderful, white flowers £5.99 Buy
Price Pruned
Bergamot ‘Monarda Squaw’ Brilliant red flowers. Mildew-resistant NOW £5.49 Buy
Catmint ‘Nepeta subsessilis Cool Cat’ Lavender-blue flowers. Great for a herb garden £5.99 Buy
Catmint ‘Nepeta subsessilis Washfield’ Pretty catmint with bright blue flowers £5.99 Buy
Catmint ‘Nepeta x faassenii’ Loose drifts of lavender flowers. Great for edging £5.99 Buy
Catmint ‘Nepeta x faassenii Kit Cat’ A dwarf variety with purple flowers £5.99 Buy