Kalanchoe luciae 'Variegata' is a spectacular form of the flapjack or paddle plant with grey-green, white and red leaves.

Kalanchoe marnieriana has blue-green, rounded, paddle-shaped leaves on vertical or leaning stems topped in summer by fiery red, bell-shaped flowers.

Kalanchoe orgyalis is a branching succulent shrub that has cool, felted, copper, spoon-like leaves with white reverses.

Kalanchoe rhombopilosa has stunning silver-white leaves with brown speckling.

Kalanchoe synsepala has green to grey-green, broadly serrated leaves with dark burgundy edges and stolons with little plantlets

Kalimeris incisa 'Blue Star' is a tough daisy relative with pale blue and yellow flowers all summer long.

Kalmia latifolia 'Carousel' flowers display an intricate banding pattern of bright purple-cinnamon.

Kalmia latifolia 'Firecracker' flower buds are deep, bright red and open to a light pink.

Kalmia latifolia 'Minuet' has light pink buds that open to flowers bearing a bright cinnamon-maroon band.

Kalmia latifolia 'Nipmuck' has intense red buds, soft pink flowers.

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

Kalmia latifolia 'Sarah' offers the best red flowers of any mountain laurel. Bright red bud, coral pink flowers that do not fade.

Kalmia latifolia 'Tiddlywinks' is a small leaved selection with medium pink buds opening to soft-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 'Gold Rush' is a red hot poker with bright yellow, tubular flowers on tall spikes with attractive, blue-green grass-like foliage.

Kniphofia 'High Roller' is a red hot poker with torches of tubular flowers in bi-colours of cream and coral-orange.

Kniphofia 'Jackpot' is a red hot poker with torches of tubular flowers in bi-colours of bright red-orange and golden orange.

Kniphofia Pyromania 'Hot and Cold' is a red hot poker with torches of tubular flowers in bi-colours of yellow and orange.

Kniphofia 'Rocket's Red Glare' is a red hot poker with torches of tubular flowers in bi-colours of bright red and yellow.

Kniphofia Pyromania 'Solar Flair' is a red hot poker with torches of tubular flowers in brilliant yellow.

Kniphofia 'Red Roulette' is a red hot poker with torches of tubular flowers in bi-colours of orange and red with very narrow foliage.