Answer: The New Guinea impatiens generally do best in morning sun and afternoon shade or in very bright dappled light all day. (In cooler summer areas they can grow in more sun than that, but without knowing your zip code or general location I can't suggest that.) Provide a location with good air circulation.
The soil should be evenly moist, damp like a wrung out sponge, but not sopping wet. In wet soil they are prone to root rot. However, do not let the soil dry out to the point that they wilt. Make sure there are working drainage holes in the bottom of your hanging basket containers and empty any saucers beneath the pots after watering. Avoid wetting the foliage when you water.
Do not overfertilize as they are sensitive to build-up of salts in the soil. Use a water soluble or slow release fertilizer at a weak strength per the label directions.
They grow best when temperatures are above 55 degrees at night and no warmer than the mid eighties during the day. I hope this helps you trouble shoot.
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