I bought some specialty coleus seeds a few years ago and want to plant them this year. If you are starting them outdoors, wait until 1-2 weeks after the last frost. The other way of germinating coleus is to cutting root in plain water. Balance Water and Light. You may be able to start seeds without artificial lighting, but seeds that need more time indoors, such as tomatoes and peppers, may become leggy without extra light. Some seeds need the stimulus of light hitting them before they will break dormancy and start to germinate. The seeds of some plant species require light for germination. And for any color, too … Coleus seeds need light to germinate, they must be planted on top of the soil. Thank you for supporting One Hundred Dollars a Month. These plants, such as balloon flower (Platycodon grandiflorus) and poppies, drop their seeds on the soil and they germinate where they land. There are two ways to grow coleus 1. This site uses Akismet to reduce spam. If you are starting them outdoors, wait until 1-2 weeks after the last frost. coleus light requirements. This post may contain affiliate links. All … In order to grow successfully indoors as a potted plant you will need to offer it five things: appropriate soil, appropriate light, food, and water and adequate pinching. Coleus seeds need light and warmth to germinate. Work a 2-inch layer of compost into the soil and then smooth the surface of the soil before planting. You may need to use a heat mat, as coleus seeds require a consistent temperature of 70-75°F to germinate. And I’m excited. I first started growing coleus about 10 years ago when Mrs. HB and I were neighbors. As with many other types of plants, the key to growing successful coleus begins with picking the appropriate potting soil. They germinate best in temperatures between 65 and 75 degrees Fahrenheit. Start indoors 6-8 weeks before average last frost in your area. Coleus likes bright light, but be careful of intense sunlight. Are you ready to start your garden but you’re not sure when you should plant your seeds or set out your transplants? Do not cover the seeds with seed starter or soil, coleus need light to germinate. You can start the seeds outdoors in USDA zones 9 and warmer any time the soil temperature is consistently 70 degrees or warmer. They need fertile, well-draining soil and usually perform best in areas with partial shade, though many varieties can also tolerate sun. I do about 75 pots on our large deck every year and it has been many years since I had to plant any since they self sow so readily. When the seedlings emerge, thin them to 12 to 20 inches apart, or closer for dwarf varieties. I also keep them in a windowsill, or as close to an E/W/S window as possible. Coleus is a popular ornamental culture from the family Yasnotkovye (Labrettes). Coleus plants kept in containers can be fed a liquid fertilizer once a month throughout spring and summer. 2. It takes 10 days or more for the seeds to germinate. You can cut and promote. Consistent moisture is good, but soggy conditions cause root disease. Cover your trays with plastic domes if you have them, and set the trays somewhere that’s between 70-75°F. Coleus seeds need light to germinate. Houseplants for different indoor light conditions 1. For more information, please see my disclosure policy. Coleus seeds need light to germinate. Learn how your comment data is processed. The seeds are very small, so it's best to pre-moisten the soil so that you don't rinse the seeds down into medium when you water. Well, I was wrong. Planting season, it’s nearly here! Watch the plant closely. Dirt + Seeds+ Water = Food and Flowers! Plan to sow them indoors, eight to 12 weeks before the last frost date in your area. The bright, full direct afternoon sunlight can scorch the leaves and bleach out the plant’s colors. I”t could even hold a large poster of ships in a harbor or a lobster. Pruning will cause the plant to grow bushier. If germinated by seeds, the seeds are usually sprinkled over the soil and pressurize them to light soil. Water the plant thoroughly after planting. Very often it is seeds that self-sow that require light. To ensure germination, these seeds should be pressed lightly onto the surface of the soil and kept moist. An easy way to place just a few of the tiny seeds on the surface of the soil is to press a small, soft artist's paintbrush into the seeds and then tap it gently over the center of the pot. Remove spent blooms, dead or dying leaves, and cut back any stems that are sick or unsightly. Germination Temperature: Optimum soil temperatures 70-75ºF. 100 seeds PLANTING. Coleus require little maintenance. Her home-and-garden and nature articles have appeared in "Birds & Blooms" and "Alamance Today." Coleus needs well-draining soil. Press the seeds onto the surface of the soil, but don't bury them. Coleus plants need temperatures of between 65°F and 75°F (24°C – 27°C). You can grow from seed. Therefore, even a novice gardener can grow a coleus from seeds at home. Coleus seeds take 7 to 14 to germinate and grow slowly at first. After sowing these seeds, lightly press them into the germination medium, but do not cover them. Seeds germinate best in a humid environment. You should use nutrient rich soil that drains well, as coleus don’t like to be in … These affiliate links help support this site. Don't confuse seed light requirements with what seedlings need. Coleus branches break easily. Second. Seeds require light to germinate, so do not cover the seeds too much. Planting Seeds:  Coleus seeds need light to germinate, so press seed into the surface of your soil and do not cover. It adds a pop of awesome color where other plants cannot thrive. Moisten the soil to a depth of several inches and then press the seeds onto the surface of the soil, but don't bury them. That way, you can be sure you’ll be giving your plants the right light exposure in the garden. I see what looks like a lot of seedlings in one growing pot. Coleus is very tender annual, and are susceptible to even a light frost. Anyone can do this. The Gardener's A-Z Guide to Growing Flowers from Seed to Bloom; Eileen Powell. Coleus questions! The reason is that the sun is the hottest in the afternoon. Check these plants more frequently and water when soil is dry. This time around though, I think I’ll plant them in a few pots on the front porch. When growing coleus, keep in mind that these beauties can grow rapidly. Brief description:  Coleus is a perfect ornamental annual for shady areas. My Mom always grew coleus when I was a child over 50 years ago and I remember my grandmother growing them. I just ordered some seeds, can’t wait! Make sure they get sunlight from a window, or place them under grow lights to germinate. Sprinkle your coleus seeds onto the soil. The ideal spot for a Coleus Plant is one that receives afternoon shade and morning sun. Keep Coleus plants trimmed. I think they’ll look fantastic against the backdrop of our little white house, and hopefully add a little joy to the people who walk by everyday with their dogs. Your email address will not be published. Coleus thrive in cool, evenly moist, well-drained soil. The culture is not picky and does not require special care. Grow coleus as a perennial in U.S. Department of Agriculture hardiness zones 10 through 12, or as an annual in any zone. If more than one seedling emerges, clip or pinch out the excess seedlings. Keep the temperature about 70 degrees, and the soil moist, and your seedlings will sprout in 10-14 days. The best care tip is to avoid sudden changes in temperature and protect them from frost. Some gardeners prefer to start their seeds in a sterilized, soil-less mix because it allows the seeds more access to light and air. Mist the seeds if you are growing coleus directly in the garden. Rules for growing Coleus from seeds at home To grow coleus from seeds is possible even for an amateur. If you plan to start them indoors, sow them 8 - 10 weeks before you want to plant outside. Light Requirement. Jackie Carroll has been a freelance writer since 1995. Keep plants moist–mulching is a good idea to help with this. When planting coleus in areas that don't get much sun, be careful not to overwater. Germination: 10-15 days. Look for a spot where the plant gets bright morning sunlight but indirect light during the afternoon. (In the table above, annuals that require light for germination are designated with the letter L in the lighting column.) You could even make a puggle spot bench with a mirror over it to reflect the light around the house. They need light to germinate, so gently press them into the potting mix, but do not cover. The weaker rays of winter, lasting for such a shorter time each day, make increased exposure necessary for most plants that have been brought in from outside. Coleus is also easy to propagate; plants grown from seed will be new creations. Thank you for the reminder about Coleus!!! When plants are 1″ tall, thin to 1 every 6″-12″. Raising coleus from seed is relatively easy. Press the seeds onto the surface of the soil, but don't bury them. Coleus seeds are fairly inexpensive and may be purchased from almost any nursery or harvested from a plant that has gone to seed.Propagating coleus from seed is a fairly easy process and within two weeks of germination, coleus seeds will have sprouted and began to show their colors. Germination takes 10 - 12 days if kept at 72 degrees F. They are also simple to propagate from cuttings. I like a full look but never know whether to follow the recommended spacing or not. Place the pots on a heating pad, seed-starting mat or cozy window sill to get them started and keep between 70ºF and 75ºF. Coleus are very easy to grow from seed and it’s fun to see the different colors of plants that will grow from one packet of seeds. However, some species (e.g., Begonia, Primula, Coleus) need light to germinate (Miles and Brown 2007). Some modern cultivars tolerate full sun, but most varieties prefer full or partial shade, and the color improves with the amount of shade. They do need to have the flower buds removed if you want them to stay compact. Space the seedlings 12 to 20 inches apart, or closer for dwarf cultivars. Of germinating coleus is easy to propagate from cuttings soil, but do not cover the seeds onto surface. Days if kept at 72 degrees F. they are also simple to propagate cuttings. In enriched soil and pressurize them to light and air days if kept 72! 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