Isatis tinctoria
A tap-rooted short-lived perennial with rosettes of grey-green leaves. Panicles of yellow in early summer.
Jeffersonia diphylla
A tufted perennial with kidney-shaped pale grey-green leaves and cup-shaped white flowers from late spring to early summer.
Jeffersonia dubia
A delicate tufted perennial with kidney-shaped blue-green leaves and cup-shaped clear lavender blue flowers from late spring to early summer.
Jovellana sinclairii
A woody-based perennial with green, toothed leaves and clusters of pretty purple spotted, lilac to white flowers.
Kirengeshoma palmata
A clump-forming perennial with pale green leaves and pretty tubular pale yellow flowers.
Kitaibela vitifolia
A clump-forming woody-based perennial with lobed slightly hairy green leaves and open cup-shaped white to rose-red flowers from mid-summer to early autumn.
Knautia arvensis
A clump-forming perennial with dull green leaves and bluish lilac pincushion flowerheads.
Knautia macedonica
A clump-forming perennial with basal green leaves and purple-red pincushion flowerheads.
Kniphofia ‘Alcazar’
A clump-forming perennial with narrow grass-like, arching leaves and spikes of orange-red flowers.
Kniphofia ‘Atlanta’
Stunning erect heads of vibrant orange-red flowers fading to pale yellow
Kniphofia ‘Bees’ Sunset’
Stunning erect heads of vibrant yellowish-orange flowers
Kniphofia ‘Border Ballet’
A clump-forming perennial with narrow grass-like, arching leaves and spikes of cream to pink flowers.