Table 1 lists foliar nutrient ranges for seed Impatiens. Plant Analysis Handbook II, MicroMacro Publishing, 1996. Test growth retardants on a small number of flats under existing growing conditions before applying them to the entire crop. Scheduling Seed Impatiens require 4 to 6 weeks in plug flats, depending on the cultivar, growing conditions, and cultural practices, followed by 4 to 6 weeks in market packs. Common Problems Physiological Low light, high fertility, high temperature, and overwatering can result in stretching, excess foliage, and poor flowering.
Water stress causes leaves to yellow and fall off.
Impatiens are very sensitive to ethylene, which can cause flower abortion, leaf abscission, and foliage damage. The most common insects and related pests of Impatiens are aphids, thrips, mealy bugs, and spider mites. Diseases Botrytis is a problem under cool, moist conditions. Rhizoctonia and Pythium can cause damping-off of seedlings. The third method is preferred by many small growers and those with limited propagation facilities.