how long does it take for impatiens seeds to grow
Propagating Impatiens by Seed. Impatiens is a slow-growing plant, and youâ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.ips on Growing Impatiens from Seeds. Growing impatiens from seeds is a slow process, but a simple one. Fill each cell with a moistened commercial seed-starting mix, leaving Â½ inch space between the top of the soil and the edge of the planter. Put the cells on a tray and fill the tray with water.