Coleus Basics

Learn how to trim, propagate and care for these showy foliage plants.


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When people think of coleus, they may think of a drab little shade plant that their grandmother grew, says garden writer and coleus connoisseur Steve Silk. But coleus has surged in popularity, due in large part to new cultivars that grow — and thrive — in full sun.

"The best thing about putting them in the sun is that the colors are much more intense and vivid," he says. "If you leave them in the shade, they'll get dull."

From small leaves with ruffles to large leaves with bold margins, all in a variety of in-your-face colors, it's easy to see why this summer annual is coveted for its foliage. The flowers pale in comparison and are generally removed to promote plant growth elsewhere. You don't want these plants expending energy for flower production.

While new cultivars are able to handle the heat, they stall when temperatures drop below 50 to 55 degrees F. And even the slightest hint of frost causes damage to the plant.

Trimming coleus makes for bushier, sturdier plants. Sometimes a coleus gets a little too tall or grows unevenly, so cutting it back gives it a more uniform shape. Save the cuttings for making new coleus.

Catch Coleus Fever

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'Marquee Blonde Bombshell' Coleus

A star in sun or shade, 'Marquee Blonde Bombshell' is a coleus with unusual, elongated leaves. The gold and yellow foliage has streaks of lime green and purple; the stems are purple, too.

Photo By: Courtesy of National Garden Bureau

Scarlet Coleus 'Kong Jr.'

'Kong Jr.’ doesn't monkey around. While this coleus didn't make it to the top of the Empire State Building when it debuted in 2013, it's climbed onto many gotta-have plant lists since then. Also available in ‘Rose’,  ‘Lime Vein’, and ‘Green Halo'. it brightens the shade all summer.

Photo By: Image courtesy National Garden Bureau

ColorBlaze 'Kingswood Torch' Coleus

'Kingswood Torch' sparkles in shades of burgundy and magenta. This coleus shows good heat tolerance and resists deer.

Photo By: Courtesy of Proven Winners

Fuseables 'Under the Sun' Coleus

A combination of 'Lime Delight' and 'Crimson Gold' seeds, this coleus mix tolerates partial sun to shade. The plants grow 20 to 32 inches tall and look especially striking when grown in color bowls.

Photo By: Courtesy of National Garden Bureau

Colorblaze 'Alligator Tears' Coleus

With its alligator-green leaves and cream-and-yellow markings, 'Alligator Tears' thrives in the garden or adapts as a houseplant. Give this coleus sun or shade; it grows 20 to 30 inches tall, so it makes a great "thriller," or centerpiece plant, in mixed containers.

Photo By: Courtesy of Proven Winners

'Lime Sprite' Coleus

Shade-loving 'Lime Sprite', with its big, lime-and-mahogany leaves, is beautiful in mixed containers. If you prefer, grow this mounding coleus in the garden or landscape instead.

ColorBlaze 'Marooned' Coleus

Burgundy 'Marooned' has won dozens of awards in plant trials at state universities and in master gardens. Hardy in zones 10a to 11b, this coleus grows in sun or shade and attracts hummingbirds.

Photo By: Courtesy of Proven Winners

'Pineapple' Coleus

Great for the garden or as a houseplant, 'Pineapple' packs a punch with its yellow, red, and lime-green foliage. Grow this heat-tolerant coleus in sun or shade.

Photo By: Courtesy of Proven Winners

ColorBlaze 'Royal Glissade' Coleus

Award-winning 'Royal Glissade' has toothy, raspberry and moss-green leaves that stand up to the heat. This coleus grows in sun or shade and resists deer while attracting hummingbirds and other birds.

Photo By: Courtesy of Proven Winners

'Painted Desert' Coleus Combination

This stunning combination, 'Painted Desert', uses 'Marooned', 'Alligator Tears', 'Lime Time', 'Sedona' and 'Royal Glissade' coleus. All these plants thrive in sun to shade.

Photo By: Courtesy of Proven Winners

ColorBlaze 'Sedona' Coleus

Named for the Sedona Mountains, this coleus has rusty orange to bronze-brown lobed leaves. 'Sedona' grows 24 to 30 inches tall in sun or shade.

Photo By: Courtesy of Proven Winners

'Wizard Velvet Red' Coleus

'Wizard Velvet Red' may remind you of a wizard's rich red, velvety robe. The leaves have serrated edges outlined with a touch of ivory-white. The compact plants grow just 10 to 12 inches high in partial shade or sun.

Photo By: Courtesy of National Garden Bureau

ColorBlaze 'Dark Star'

Inky-purple 'Dark Star' can look nearly black in shady spots, but it also thrives in sun. The plants grow 12 to 16 inches tall and are eye-catching in beds of white or silver flowers and foliage.

Photo By: Courtesy of National Garden Bureau

Propagating coleus

Coleus can be started from seed, cuttings, transplants or potted plants purchased from the nursery. Just give them the basics and watch them take root. "This is a plant that just wants to grow. Provide it with enough light, decent soil and enough water, and it's going to grow quickly," says Silk.

To grow your own from cuttings, first prepare the soil mixture. Silk likes to use one part perlite combined with one part potting soil. As he mixes, he adds enough water to make the soil as moist as a lightly squeezed sponge. "It often takes more water than you think because the perlite absorbs more moisture," he says.

Once the soil mix is ready, fill pots with the mix and make two-inch-deep holes for each cutting, using a pencil or your finger. Before planting, the cutting needs preparation. Remove any flowers by cutting back to a pair of leaves. This will force the plant's energy into making roots.

Silk recommends keeping three sets of leaves. After the fourth set, he cuts the stem and removes the bottom leaves. "Where I cut the branches off at the bottom is where the first new roots are going to form," he says. Then stick the wound of the cutting into the rooting hormone, a product that kickstarts root growth. Lightly tap off the excess hormone from the cutting and stick it into the hole, firming the soil around it.

Place the pots with cuttings on a tray and water the tray, instead of the plants, so you don't wash away the rooting hormone. Then place the tray in the shade, keep it watered and wait for roots to form. After a couple weeks or so, check the bottom of the pot. When roots start coming out of the bottom of the pot, the coleus is ready to plant in the garden.

Planting coleus

The next step is start planting. "What I like to do is move slowly from one color to another and link them back and forth from plant to plant so it makes a smooth sort of seamless tapestry," he says. One coleus leads to another: 'Japanese Giant', the chartreuse green 'Amazon', the orange 'Smallwood's Driveway'.



A word of warning when planting coleus: even an extra hour or two of sunlight may affect the plant's coloring. Colors can change radically, which is something to keep in mind when picking them out at a garden center. Consider how much light they are growing in and how that will change once you plant it at home.

Container gardening with coleus

If you don't have a lot of room to grow coleus in your garden, use them in containers. Pair different selections together or with complementary plants. Silk recommends fertilizing with liquid 20-20-20 about once a week.



Overwintering indoors on a sunny windowsill is one solution, but does have drawbacks. "Coleus are fairly popular as houseplants, although I'm not quite sure why. They tend to be magnets for spider mites and white flies in particular," says Silk. When infestations occur on houseplants, he uses rubbing alcohol or horticultural soap to eliminate the problem.

If you bring coleus indoors for the winter, don't worry if it begins dropping leaves. That's the plant's way of adjusting to less light and cooler temperatures.

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