Coleus (Solenostemon hybrids)
Life cycle: Very tender perennial.
Hardiness: Zones 10 to 12.
Height: 6 inches to 5 feet (the average height is 1-2 feet tall).
Spread: 1 to 3 feet wide.
Foliage: Colorful foliage with purple spikes of flowers (many people pinch them off).
Exposure: Sun to part shade; the intensity of light has a direct effect on the intensity of its foliage. Some varieties may produce their best color in light shade, while others look best in bright sun. Some experimentation may be necessary to find out what your plant likes best.
Soil: Moist, well-drained soil.
Propagation: Seeds (easily obtainable) or stem cuttings. A 3 or 4 inch long stem cuttings will readily produce roots, even in a glass of water.
Maintenance: Pinching (removing) the terminal bud of each shoot when it reaches three to four inches in length will encourage side branching, prevent flowering, and produce more beautiful foliage.
Coleus has a longstanding and well-earned reputation as being a plant almost anyone can grow. Morning sun with afternoon shade works well for most varieties, although many of the newer hybrids (usually with "sun" or "solar" in their names) have been bred to handle more light.
As a general rule, most coleus will tolerate some sun, but their colors will look their best in partial shade. Deep colors like black and burgundy will look more intense, and whites and creams will stay brighter. If your plants are growing in containers, try moving them to different locations to see what works best.
Coleus grown in the sun prefers consistent amounts of moisture, but when grown in shade it shows tolerance for drier soil. In the hottest parts of the country, plants may need watering every day. Leaf drop is usually a good indicator that the plants are not getting enough water. Though they sometimes wilt in heat, coleus will recover quickly once you give them a drink. Applying a couple of inches of mulch around your plants will help conserve moisture.
Despite all of the color it provides, coleus doesn't need a lot of feeding. In fact, even without fertilizer coleus tends to be a vigorous grower. To get the best leaf color apply a dose of balanced, 10-10-10 water-soluble fertilizer early in the spring, and if necessary, follow up with one more mid-season. When the plants are small, pinch the stems back by about a third to keep them compact. Deadheading any flowers you see (they are small and insignificant anyway) will keep the plants growing strong.
Coleus make nice house plants as long as they receive sufficient light and food. Basic care indoors includes the following:
Coleus is technically a tender perennial - a very tender perennial. Cold weather causes stunted growth and plants seem to turn to mush when there is even the slightest rumor of frost in the forecast. In the spring, hold off on setting plants out until the soil temperatures stay above 55 degrees F. When it's safe to set out your tomato plants, it's safe for coleus, too.
Coleus is incredibly versatile in the garden. Use it in container arrangements, in borders or as specimen plants in mixed beds. These plants are vigorous growers. Make sure you give them plenty of elbow room so they don't crowd their nearby companions.
To keep plants from getting leggy and to control their growth, frequently pinch or cut back the stems. Then recycle the cuttings by tucking them into bare spots around your garden. Coleus stem cuttings start easily in moist, well-drained soil (or even in a glass of water). If you give them a little protection from harsh midday sun they will establish themselves quickly.
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Use the pinched back portion of the coleus to make new plants. Coleus are easily rooted.
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I have a coleus that is huge. It is so big that the branches are breaking off from the weight of the branches and foliage. The funny thing is, these large branches, while still attached to the main stem, are growing roots and wrapping those roots around the main stem. When I break off one of these limbs, it looks like a complete plant. I have never seen this before.
The plant is about 4 feet tall and extremely healthy and vigorous. I have about 40 new plants from this one and I have only had it about 3 months. Does anyone know about this growth habit, or have ever seen this with a coleus?
I thought I would just have a small, nice addition to the deck. It is almost turning into Little Shop of Horrors. Thanks to anyone that has some info.
Hardiness Zone: 11
By Steve from St. John, US Virgin Islands
I've never seen that (not to say that it doesn't happen). I would love for that to happen to mine but then again you are in zone 11 which is downright tropical so I guess anything goes. :)
I have two coleus plants that I started from seeds and they're also HUGE. When I spin them to encourage growth upward (instead of sideways toward the sun in the window) branches often break from their own weight since they had previously been supported by the wall.
It frustrates me so much because they're so pretty but seem so dumb. Why would they let themselves grow so much as to not be able to support themselves hahahah
Not sure what the fix is, why I would love to do, since when they break off there's often a big ugly whole where a large branch used to be.
The "starter plants" (coleus) wilt at ground level. Is this a soil or insect problem?
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Coleus leaves come in a variety of striking colours and go very well with colourful annuals.
By Grayce from Toronto Canada
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By Elaine from Iowa