Drain the seeds on a piece of paper towel for 20 minutes before sowing. When I transplanted the seeds into individual pots, I … Soak the iris seeds in the water, placing a saucer on top so the seeds stay submerged and don't float to the top. Spread 1 inch of aged compost over the soil. Space the sprouts 3 to 4 inches apart in the tray so the roots have room to develop. Till the soil again to a depth of 6 inches. Soak the seeds for two weeks, changing the water daily. Mix 1 part bleach with 10 parts water in a small bowl after the initial two-week water soak. Run the light 24 hours a day, adjusting the height to maintain the distance as the plants grow. Plant the seeds about ½” to ¾” deep and a few inches apart, and mark the area. Can I Plant Grass Seed in October? The genus Iris includes over 200 species of plants widely grown in U.S. Department of Agriculture plant hardiness zones 3 to 10. Her work has appered in the "Houston Press" and several other publications. Learn which plants thrive in your Hardiness Zone with our new interactive map! Water the seedbed whenever the top 3 to 4 inches of the soil dry out. For best results, plant iris seeds in fall, winter and the early months of spring, according to the Tucson Area Iris Society. Butler began blogging, editing and writing in 2000. Plan the perfect garden with our interactive tool →, Iowa State University Extension; Horticultural and Home Pest News; Irises for the Home Landscape, Tucson Area Iris Society: How to Grow Iris from Seeds, United States Department of Agriculture; Plant Guide; Douglas Iris. Drain the seeds on a piece of paper towel for 20 minutes before sowing. Store the bag in the refrigerator for 12 to 14 weeks, which emulates the cold weather that forces iris germination outdoors. Place the seeds in a clear plastic bag and seal it closed to retain the moisture on the seeds. If you want the seedlings to produce true to the parent, only plant seed from nonhybrid iris varieties. As you turn the soil, remove any rocks, plants or other debris from the planting area. Grow the iris seedlings under sheltered conditions until late spring, at least six weeks after the last spring frost. She has an A.A. in journalism and a B.A. Be careful-they look like grass at the seedling stage until they develop the distinctive, flat fan arrangement of leaves that are typical of the iris … Starting wild iris from seed is a simple task, but it requires patience. Most viable seeds will germinate within one week of this treatment. The wild iris seeds will germinate within two to three weeks after the ground thaws. Fill a 2-inch pot half full with moist sand. Growing Grass. Japanese (Iris ensata) and Siberian irises (Iris sibirica), which both grow in U.S. Department of Agriculture plant hardiness zones 3 through 9, grow... Irises grown from seed take more effort than the usual tuber propagation method, but it's the only method that allows you to create your own hybrids or color combinations. Rinse the bleach solution from the seeds with cool water. How to Plant Iris Seeds. Seed pods may contain just a few seeds or many (even over 100 seeds). Japanese (Iris ensata) and Siberian irises (Iris sibirica), which both grow in U.S. Department of Agriculture plant hardiness zones 3 through 9, grow most readily from seed, but it's possible to start most irises from seed with some degree of success. Fill a bowl with 90 to 100 degrees F water after the third day of room temperature holding. How Do I Store Iris Bulbs Over the Winter? How to Plant Iris Seeds Alternatively, plant each sprout in an individual 4- to 5-inch-diameter pot. These require holding at 55 degrees Fahrenheit after cold treatment. Once wild iris germinates, it must grow for two to four seasons before the plant is mature enough to flower. How to Grow Peppers From the Seeds Inside of the Pepper, How to Grow Moss Rose (Portulaca grandiflora), How to Stop Bugs From Eating Pepper Plants, How to Identify Wild Mushrooms in Pennsylvania, How to Care for a Bamboo Plant With a Yellow Stem, Care of Hydrangea Plants in Orlando, Florida, How to Care for Petunias to Grow Back After the Winter. Now let nature take its course. The genus Iris includes over 200 species of plants widely grown in U.S. Department of Agriculture plant hardiness zones 3 to 10. Loosen the soil to a depth of 6 inches with a hand or rototiller. Based in Houston, Texas, Meg Butler is a professional farmer, house flipper and landscaper. Water the seed bed with a gentle spray of water until the top 3 to 4 inches of the soil are moist. Grow the iris seedlings under sheltered conditions until late spring, at least six weeks after the last spring frost. I harvested a few seed pods from what I believe was a Japanese iris when I was visiting my nephew in New York. Although it's possible to start iris seeds directly in the garden bed, it can take 18 years after planting for them to germinate. Irises grown from seed take more effort than the usual tuber propagation method, but it's the only method that allows you to create your own hybrids or color combinations.