New Guinea impatiens are low-maintenance annuals with colorful foliage and flowers in every color but blue, yellow and black. Unlike standard impatiens, New Guinea impatiens can be grown in the sun, provided they are given adequate water to keep the soil moist. They can be grown as bedding plants or in containers and hanging baskets. New Guinea impatiens are not heavy feeders, but do require consistent fertilization throughout the blooming period.
Fertilize the New Guinea impatien for the first time three weeks after planting, and use the fertilizer solution in place of water every third watering.
Water the New Guinea impatien bed until moist if the soil is dry. Allow the water to drain completely. The soil should be moist, but not saturated when you fertilize, so you may need to allow three to four hours for the soil to drain.
Fill the garden sprayer with a mixture of water and 10-20-10 fertilizer with minor elements at the lowest rate recommended on the fertilizer package.
Spray the soil around the New Guinea impatiens until saturated, as well as the plant's foliage.