21 days
Overview. Although some impatiens varieties can be grown in sun, the shade-loving varieties add a blast of color to a drab garden. The impatiens can be grown indoors or outdoors and in planters and hanging baskets. Planted in masses, you can create a carpet of multicolored impatiens in the garden. The annual variety is easier to grow from seed, so choose the appropriate annual seed for your specific growing conditions. Start germinating your impatiens seeds eight to 10 weeks prior to the last frost. The first flowers should bloom within eight to 10 weeks of sowing the seed. Move the seedlings to a protected area of the garden and leave them there for three hours a day. After 3 days, begin to lengthen the period that the seedlings are left outside. In 10 days the seedlings should be hardy enough to be planted Propagating Impatiens by Seed. Impatiens is a slow-growing plant, and you’ll need to start the seedlings about three months before your last spring frost. Impatiens seed germination can take up to 21 days, with most of the sprouting happening within the first two weeks. If you grow any flowers outdoors, the odds are good that you’ve grown impatiens. This cheerful flower is the most popular one grown in the country, and with good reason. It does well in shade as well as partial sun, and works in planters as a hanging plant and in bedding. Once your impatiens are in the ground, they will need at least 2 inches of water a week if planted in the ground. If the temperatures rise above 85 F. (29 C.) they will need at least 4 inches per week. If the area where they are planted does not receive that much rainfall, you will need to water them yourself.  1 Make sure the plants have some shelter from the wind. 2  The closer impatiens plants are, the taller they will grow, so space accordingly (impatiens plants can grown anywhere between 6 and 30 inches tall). 3  For flower beds, plant 8 to 12 inches apart so the plants will stay low to the ground. impatiens in the winter. If your impatiens get to long and leggy, you can also take cuttings and root them in water to start new plants. For plants I grow outside, I will cut back before the first frost and leave the cuttings in water in a sunny window til spring and then plant them outside. Growing impatiens from seed. Growing impatiens from seed is a good way to save money if you like to plant flats and flats of these popular annuals. The ideal time to start is eight to 10 weeks before the last frost in your area. Fill seed flats with a sterile seed-starting mix that you have moistened. Place your flats under grow lights or near a window where they get bright indirect light. The soil temperature should be about 70 to 75º F (21 to 24º C). Your impatiens seeds should sprout within seven days to two weeks, although it can sometime take a little longer if temperatures are cooler. 1 Plant impatiens transplants after the last spring frost in humus-rich, moist, well-drained soil. 2  Make sure the plants have some shelter from the wind. 3  The closer impatiens plants are, the taller they will grow, so space accordingly (impatiens plants can grown anywhere between 6 and 30 inches tall). impatiens in the winter. If your impatiens get to long and leggy, you can also take cuttings and root them in water to start new plants. For plants I grow outside, I will cut back before the first frost and leave the cuttings in water in a sunny window til spring and then plant them outside. Impatiens in a container. Place your flats under grow lights or near a window where they get bright indirect light. The soil temperature should be about 70 to 75º F (21 to 24º C). Your impatiens seeds should sprout within seven days to two weeks, although it can sometime take a little longer if temperatures are cooler. Remove the plastic cover or plastic wrap as soon as the seedlings germinate Harden the plants outdoors for 7 to 10 days before planting them into the garden. Place the plants in a shady, protected area for 2 to 3 days, then gradually expose them to a few hours of sun. Plant them into the garden after the danger of frost is past.  1 Impatiens can be planted close together to make nice borders in a flower bed. 2  You can set a few in a container spaced 2 to 3 inches (5 to 7.5 cm) apart. 3  Instead of a container, you may choose to set your impatiens in hanging baskets. 4  Your impatiens will soon grow together and cover any bare soil that is in between them. 1 You can set a few in a container spaced 2 to 3 inches (5 to 7.5 cm) apart. 2  Instead of a container, you may choose to set your impatiens in hanging baskets. 3
http://www.gardenguides.com/81312-germinate-impatiens-seeds.html http://www.gardeningknowhow.com/ornamental/flowers/impatiens/impatiens-seed-propagation.htm http://www.gardeningknowhow.com/ornamental/flowers/impatiens/growing-impatiens-flowers.htm http://www.almanac.com/plant/impatiens http://www.flower-gardening-made-easy.com/impatiens-from-seed.html http://www.almanac.com/plant/impatiens http://www.flower-gardening-made-easy.com/impatiens-from-seed.html http://www.ipm.iastate.edu/ipm/hortnews/1996/2-9-1996/impa.html http://www.wikihow.com/Grow-Impatiens
how long does it take impatiens to germinate