Plant library · Annual Flowers
Impatiens walleriana
Impatiens brings a low, rounded layer of color to deeply shaded beds, sheltered entry gardens, and containers. At roughly 18 inches tall and wide, it can fill the space beneath taller shade planting without blocking views or narrowing circulation. Its bloom period runs from late spring into fall, so use it where a long-lived seasonal display is more useful than a brief spring flourish.
Use impatiens to soften the front or middle of a shade border, edge a path that stays clear of strong sun, or fill containers in dark corners. Keep planting areas within easy reach for regular watering and for removing any declining plants promptly. In beds, let it form a continuous seasonal layer beneath shrubs or taller foliage, but leave a clear working edge along paths, walls, and steps rather than allowing the planting to spill into circulation space.
Set plants 12 inches apart, center to center, for a close, connected planting. Each plant may reach about 18 inches wide, so the foliage can knit together as the bed fills in; reserve extra open space at the bed edge where access is needed. In a narrow border, a single row is usually easier to water and inspect than several crowded rows.
Place impatiens in full shade, with soil kept regularly moist through the growing season. Give containers enough root room and position them where they can be watered without moving through the planting. Avoid sites that routinely dry out between visits, since this annual is best used where consistent moisture can be maintained.
Treat impatiens as a warm-season annual layer. Its late-spring-to-fall flowering window makes it useful for holding color through the main garden season, then opening the bed for a different display after frost. Plan nearby plantings so their later growth does not shade access to the impatiens or make watering difficult.
Build in room to inspect foliage, especially in humid or persistently wet weather. Garden impatiens are susceptible to downy mildew; yellowing, downward-curled leaves, pale growth beneath leaves, leaf drop, and bare stems warrant quick removal of affected plants. Do not compost diseased material, and avoid repeating impatiens in a spot where the disease has been a problem.[1][2]
Editorial content updated 2026-07-20.