When can I plant impatiens outdoors?
Plant impatiens outdoors after the danger of frost is past. It’s usually safe to begin planting impatiens in late April in southern Iowa and mid-May in northern portions of the state. Plants purchased at a greenhouse or started indoors should be “hardened” or acclimated to outdoor conditions for several days prior to planting. Initially place the plants in a shady, protected location and gradually expose them to longer periods of sunlight.
Impatiens perform best in moist, well-drained soils in partial shade. Sites that receive 2 to 4 hours of filtered sun during the day or morning sun and afternoon shade are usually ideal. Impatiens can also be grown in heavy shade. However, plants will be taller and bloom less profusely in heavily shaded locations.