Article by Plant Care Today. Plant Coleus Seeds: Sow seed in cell packs or flats, use a sterilized soil-less mix. Needs light to germinate. Coleus seeds aren't easy germinators, and they're quite tiny. Once you have a general idea (typically a safe bet for zone 6 is Mother’s Day, but more on that later), you’ll want to plant your coleus seeds 8-12 weeks before that date. Growing Tips. A fifth and final step to growing healthy coleus plants is to make sure any budding flowers are pinched off to prevent allowing to go to seed. Rainbow Coleus plants are greatly used in gardens where the sun doesn’t shine often. The simplest method is to use a seedling tray full of potting soil and evenly spread seeds across it. Coleus (Coleus x hybridus) is an annual valued for its brilliantly colored foliage in shades of burgundy, pink, red, yellow, green and bronze. Cold Weather Options A packet of coleus seeds; Seed tray; Seed compost; Polythene bag; How to grow. Most gardeners buy coleus seedlings, many of which are grown from rooted cuttings. Sow tiny coleus seeds atop moist seed starting mix and gently press them into the surface. The biggest advantage to growing from seed is the variety it opens up in your flower bed. If you are growing them as a houseplant, then you can start it by seed at any time, though they continue to grow year-by-year. Sow the coleus seeds in a pot containing seed raising potting mix, just sprinkle the seeds over the damp soil. Propagate coleus plants by seed. How to Save Coleus Flower Seeds. Grow Rainbow Coleus Mixture from fresh Coleus blumei seeds. Coleus seeds are usually found in mixtures, offering several varieties of colors and sizes in one seed mix. Coleus grown from seed produce plants with interesting diverse colors, leaf forms, and markings. To grow plants to a good size for my Mid-Atlantic state of NJ, I sometimes begin growing them right after Christmas. Growing a Coleus collection from seed is really quite easy and quick. When to grow. Coleus (Coleus Wizard Jade) - Start Coleus seeds for this exotic foliage plant that never disappoints!Wizard Jade has ivory at the center of the leaves and greens around the edges. Coleus make excellent houseplants too. Aloe africana seed pods formed and starting to dehisce (left); seed from pods (right) . These beauties will add flair to any room indoors as well. You can start growing coleus indoors by adopting three different methods: with a seed, with a seedling, or using cuttings. Select coleus seed in the colors and leaf shape you prefer. Coleus are known for their colorful leaves and are a great addition to shaded or part-sun areas of your garden. 1. Plant larger coleus varieties 12 to 18 in. They are doing very well, although they are not too tall. If you wish to plant seedlings in soil instead of an AeroGarden, keep the following tips in mind. Determining when to plant coleus from seed (also referred to as germinating the seed) comes down to when you plan on planting the coleus plant outside. Coleus seed can be sown at any time of the year if you are growing it as a house plant. The easiest route is probably to start with a seedling, but we’ll cover all three here and let you choose for yourself. I am just curious how your plants are doing. You’ll want to start your seeds indoors about 10 weeks before your last average frost date. Another advantage to growing your Coleus this way, is that each packet of seeds will contain many different colors of plants. Propagate Coleus by cutting I also grew coleus from seeds this spring. You can start growing flower seeds indoors, in a planter, or outside in your garden or flower bed. Coleus can easily be grown from seed, but this is a less popular method for propagation, since the plants don't come true from seed. Transplant seedlings of dwarf coleus into the garden 9 to 12 in. Fill the tray with damp, lightweight seed starting mix. Shade Garden Garden Plants House Plants Garden Seeds Planting Seeds Planting Flowers From Seeds Growing Flowers Growing Plants Growing Gardens. You will see seedlings in about 2-3 weeks. I had seen some crazy lush hanging baskets and planters […] Use a seed starting tray that contains drainage holes. Starting coleus from a cutting gives you an exact replica of the mother plant. Moisture, sunlight, and the proper soil are the most important components to growing a flower from a seed. You can also purchase seeds and start them indoors – or outdoors, if you are in Zones 9-11. Aloe africana flowering in my yard (left); Flowers opening up right and ready to be pollinated by bees (right) . Add another layer of potting soil on top so that the seeds are no longer visible. Sowing Seed Indoors: Sow indoors 6-8 weeks before last frost using a seed starting kit. 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