Table of Contents
Coleus seeds need light and warmth to germinate. Sow seeds on top of damp soil or seed starting mix, press them gently into the soil and do not cover. Place the pots on a heating pad, seed-starting mat or cozy window sill to get them started and keep between 70ºF and 75ºF.
How long does it take to grow coleus from seed?
Sowing Seed Indoors: Coleus can benefit with bottom heat. Seedlings emerge in 12-21 days. As soon as seedlings emerge, provide plenty of light on a sunny windowsill or grow seedlings 3-4 inches beneath fluorescent plant lights turned on 16 hours per day, off for 8 hours at night.
Is coleus easy to grow from seed?
The shade-loving coleus is a favorite among shade and container gardeners. With its bright leaves and tolerant nature, many gardeners wonder if coleus propagation can be done at home. The answer is, yes, and quite easily. Taking coleus cuttings or growing coleus from seed is quite easy.
When should you start coleus seeds?
Coleus seeds take 7 to 14 to germinate and grow slowly at first. Starting them indoors eight to 12 weeks before your last expected frost date gives them plenty of time to grow into sturdy seedlings before transplant time, advises Missouri Botanical Garden.
Does coleus come back year after year?
Coleus is a perennial, a tropical shrub, that is not hardy except in warm, frost-free zones.
Does coleus like sun or shade?
Coleus thrive in cool, evenly moist, well-drained soil. Consistent moisture is good, but soggy conditions cause root disease. Watering should complement available sun. Some modern coleus varieties handle full sun, but most still flourish with at least dappled shade and direct sun limited to morning hours.
How often do you water coleus seeds?
Coleus in containers may need watering twice a day during hot weather. Outdoor containers may require water twice a day. Indoor plants need water only once every two or three days, or a bit more if you live in a dry climate.
How can I make my coleus grow faster?
Keep them indoors in a sunny window, and wait to move them outside until nighttime temperatures stay in the 50s. Coleus won’t grow any faster if you put them out early, and you could actually stunt their growth or they might die, even if temperatures stay above freezing.
How do I make my coleus bushy?
You can make coleus bushy by routinely pinching the stems and leaves from the plant. Over time, the main stem or trunk of your coleus will become strong and support a larger, fuller plant. Regular feeding with a diluted liquid fertilizer can also promote growth.
How long are coleus seeds viable?
Seeds in good condition and stored properly will last at least one year and, depending on the plant, may last two to five years.
Why is my red coleus turning green?
Your coleus plant is most likely turning green because it isn’t getting enough light to maintain its original color. Coleus plants need lots of sunlight to keep their color, so if they aren’t getting enough, you’ll need to give it more to restore their beautiful hues.
Do coleus seeds need light to germinate?
Coleus seeds need light and warmth to germinate. Sow seeds on top of damp soil or seed starting mix, press them gently into the soil and do not cover. Place the pots on a heating pad, seed-starting mat or cozy window sill to get them started and keep between 70ºF and 75ºF.
When should I repot coleus seedlings?
It isn’t mandatory to repot your coleus immediately after purchase, unless the roots show that they’re feeling squeezed. Repotting in a pot of a slightly larger size is recommended at the end of every winter. From mid-May onwards, the plant can be brought outdoors.
Is coleus a good houseplant?
Although coleus is typically grown outdoors as an annual, its vibrant leaves provide many months of enjoyment indoors if growing conditions are just right. In fact, coleus plants respond well to potted environments.
Can I leave coleus outside in winter?
Winterizing Coleus Seeds When nighttime temperatures rise above 50 degrees Fahrenheit, it’s safe to move them outdoors. Transition the coleus by bringing them outside during the day and indoors at night, suggests the University of Minnesota Extension.
Are coleus annuals or perennials?
Coleus is technically a tender perennial and not cold hardy in much of the country, so many gardeners simply grow it as an annual. But even in wintry climes, you can keep favorite plants going by taking cuttings in early fall to propagate indoors.
Can coleus grow in pots?
Plant your coleus in a sturdy container that won’t tip over if it does get to be 2 feet tall. Fill your container with well-draining soil and fertilize moderately. Be careful not to over fertilize, though, or your coleus in pots may lose their brilliant color. Water regularly, keeping the soil moist.
Where is the best place to plant coleus?
Plant coleus in a sunny or partly shaded spot, in moist but well-drained soil. Coleus are low growing, so they look best at the front of a border, combined with other bedding plants, or in pot on a patio. If you’re growing coleus as a house plant, grow it in a bright spot that gets a little direct sun.
What bug is eating my coleus?
Pests. Coleus plants are sometimes attacked by mealy bugs, which resemble bits of white fuzz, though they may also be infested with whiteflies, aphids, spider mites and slugs, says Clemson University.
How do you grow coleus seeds indoors?
Place a polythene bag over the top of the tray until the seeds have begun to grow, this helps germination. Put the tray somewhere warm as the seeds will germinate at 20–25°C. When the seedlings are big enough to handle and have their true leaves you can transplant them into small pots.
What is coleus good for?
Coleus is a plant that has been used since ancient times to treat heart disorders such as high blood pressure and chest pain (angina), as well as respiratory disorders such as asthma. Forskolin is a chemical found in the roots of the coleus plant. Coleus drops are used in the eyes to treat glaucoma.
