A clump-forming perennial with dark green leaves and spikes of white flowers produced in summer. ..
A perennial with light green aromatic ferny leaves. Clusters of golden yellow flowerheads produced in summer.
An upright perennial with dark green leaves. Dense spikes of ivory flowers smudged with violet on upright stems.
Photo provided by: Rijnbeek..
An upright perennial with dark green leaves. Dense spikes of white flowers on upright stems...
An erect perennial with dark green leaves, branched panicles of rich blue flowers...
A shorter variety that normal with burgundy new growth, changing to dark green and branched panicles of rich, clear, dark blue flowers. Height 60cm. S..
Lower-growing monkshood with short spikes of large purple-blue hooded flowers and beautifully thick, glossy dark green feather-shaped leaves.
A RARE form of aconitum with lengthy spikes of hooded sherbert yellow flowers that sit on upright stems among wispy mid-green foliage.
An upright perennial with finely-divided, glossy green leaves and short spikes of light blue, hooded flowers.
Photo provided by: Just Must Perennials..
Clump-forming perennial with very dark black foliage and spikes of white, scented flowers, like narrow bottlebrushes.
Photo provided by: Kernock Pa..
An upright perennial with lush green leaves and spikes of bell shaped violet flowers. Height 70cm. Spread 50cm. Flowers from July to September.
Clump forming with strap-shaped deep green leaves.Tall clusters of bell-shaped, dark indigo blue flowers on black stems...
A dainty, compact agapanthus that flowers prolifically from mid to late summer, earlier in mild areas. The light blue starry flowers have darker bars ..
A towering agapanthus with large heads of dark ink blue flowers in bud which open into tubular flowers of a lighter blue with mauve stripe.
An ultra compact selection, with gold and green variegated linear leaves and light sky blue flowers. Long flowering period. First appeared at Chelsea ..