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.

Kniphofia 'Rocket Jr.' is a non-stop blooming dwarf red hot poker that offers fiery spikes through summer into fall.

Lagerstoemia Barista 'Brew Ha Ha' has blue green leaves with burgundy highlights and deep bubblegum pink flowers.

Lagerstoemia Barista 'Bubble Tea' has late season lilac purple flowers.

Lagerstoemia Barista 'Chai Berry' has glossy green leaves. In late summer this small shrub bursts forth with rose pink flowers from rose pink buds.

Lagerstroemia Barista 'Cherry Mocha' has burgundy stems and semi-glossy burgundy foliage topped with cherry red flowers.

Lagerstoemia Barista 'Cool Beans' has dark olive green leaves with rosy red edge and salmon pink flowers from rosy red buds.

Lagerstoemia Barista 'Dark Roast' has rich, glossy, deep burgundy leaves topped with fuchsia pink flowers.