Many of the newer cultivars have compact growth habit and do not require chemical height control. Scheduling The timing of New Guinea Impatiens crops depends on several factors including cultivar, environmental conditions, pot size, number of cuttings per pot, and cultural practices. Growers should keep detailed records of crop performance and timing to improve future scheduling efforts. Use Table 2 as a scheduling guide. Common Problems Physiological Low light and low fertility can cause mottled foliage.
Water stress causes leaf and flower bud abscission.
Pests Common insects and related pests of New Guinea Impatiens are spider mites, cyclamen mites, thrips, mealybugs, and aphids. Diseases Pythium and Phytophthora cause root rots. Rhizoctonia causes stem rots. Botrytis can be a problem under cool, humid conditions. Specific control measures for insect and disease problems can be found in Extension Circular ANR-500, Alabama Pest Management Handbook.