Next to a hummingbird, you might find an impatiens seed on the porch, in a bird feeder, on the floral rug, and even in the air. That's because impatiens are known as a plant with a wide variety of seeds—approximately 500–600 in every 100 flowers.Plant impatiens again without the risk of Impatiens downy mildew damage; Beacon Series impatiens are highly resistant to this widely prevalent disease. Through spring and summer, 15 - 20 in. tall and 12 - 14 in. wide plants create brightly-colored mounds. Beacon impatiens are beautiful planted in any shady to partially sunny garden location, including patio containers, window boxes, low borders and walkways. Impatiens provide long-lasting, colorful flowers. Plant in mixed borders, or alone in large beds. Include Double Impatiens for impressive container plantings. New Guinea Impatiens are disease resistant. Flowers are huge.
Grow Impatiens: Morning sun to dappled shade. Shade preferred in hot climates. New Guinea impatiens will tolerate somewhat more sun; avoid hot afternoon sun. Keep soil evenly moist, not soggy. Water impatiens early in the day, foliage and stems will be dry by evening, plants less likely to be bothered by slugs and snails. Impatiens are excellent container or hanging basket plants. Bloom season is long, from spring until frost. Impatiens flowers attract hummingbirds. mpatiens are excellent plants for shady areas in the home landscape. Impatiens are ideal for flower beds, planters, and hanging baskets. Their versatility and adaptability to shade have made impatiens the most popular annual bedding plant in the United States. Impatiens are relatively easy to grow from seeds. However, they are slow growing. Home gardeners should sow seeds in early to mid-February to produce stocky transplants by spring. Suggested impatiens for Iowa include varieties in the Accent, Impact, and Super Elfin series. Plants in these series are compact and free flowering. Also, a wide range of colors are available in each series.
Impatiens seed pods start out green and ripen to a light brown color before bursting open, broadcasting their seeds onto the soil. There is only a narrow window of time between when the seeds are ripe and when they are expelled from the pod, which is the trickiest aspect of gathering them. The National Gardening Association suggests placing a small bag over the unripened seed pods and leaving it in place until the pods burst and the seeds fall into the bag. Nylon pantyhose make an ideal bag because they will catch the seeds while also maintaining airflow around them, which will keep them from rotting.Impatiens seeds need plenty of warmth and light to successfully germinate. Cornell University recommends starting the seeds indoors 12 weeks before the last spring frost to give the seedlings a head-start on the growing season. Fill 3-inch plastic nursery pots with very moist seed-starting compost. Impatiens seeds need light to germinate, so spread a few seeds across the surface of the compost and gently press them onto the surface. Scatter a pinch of perlite over the compost to help hold moisture around the seeds without blocking the light. (Source: homeguides.sfgate.com)