Kaempferia roscoeana, peacock ginger, has beautifully marked oval leaves and lavender flowers with white eyes.

Kaempferia rotunda has orchid-like white and purple flowers and striking mottled elliptic foliage.

Kaempferia rotunda 'Mt. Kanchangjung'/'Himalayan Easter' has pure white orchid-like flowers and striking mottled foliage.

Kalmia latifolia 'Pink Charm' offers pink buds and rich pink flowers.

Kirengeshoma koreana is a tall herbaceous plant with serrated maple-like leaves and creamy yellow bell flowers.

Kirengeshoma palmata or Korean waxbells is a stately shade perennial with maple-like leaves and yellow bell flowers.

Kirengeshoma palmata 'Black Style' is a Korean waxbells with black stems that hold up the creamy yellow flowers.

Kniphofia caulescens is a broad-leaved evergreen red hot poker with blue-grey foliage held on a short woody trunk.

Kniphofia rooperi is a late summer blooming red hot poker with large, orange-red, egg-shaped flowers fading to yellow.