Fertile, well-drained soil.
None. Impatiens cannot tolerate cold temperatures.
Mix a standard application of a balanced organic fertilizer into the soil prior to planting. In midsummer, drench plants with a liquid plant food to stimulate new growth.
Coleus and Begonia. Impatiens grow better in shade than most other annuals. You can combine them with coleus with leaf colors that echo those from impatiens blossoms.
Single Plants: 7″ (20cm) each way (minimum)
Rows: 7″ (20cm) with 11″ (30cm) row gap (minimum)
Sow and Plant
Sow impatiens seeds indoors in moist seed starting mix, and provide very bright light. Most gardeners buy impatiens seedlings, which are widely available as bedding plants. Allow 12 inches (30cm) between taller varieties of New Guinea impatiens.
Impatiens need a steady supply of water. Varieties are available in more than twenty different colors and bicolors.
Impatiens shed their old blossoms cleanly, so there is little need for removing old blossoms. However, pruning back tired plants in late summer can help stimulate new growth.
Spider mites can be a problem, especially with impatiens grown in containers. In recent years, impatiens downy mildew has become a serious problem in many parts of the US following periods of cool rain.