Sunpatiens annuals require well-draining, moist soil conditions to thrive and grow beautifully. When they are first planted either in the ground or a container, water their soil well and make sure it remains moist for the first 7 to 10 days, or until they are well established. Once your flowers are well established, you can water them moderately but not sparingly. If their soil dries out, they will wilt and become leggy. If you notice your plants are wilting, give their soil a deep watering, and they should perk back up quickly. However, do not let your plant's soil be too moist and have your plant's roots sitting in standing water. If they are sitting in too much water, their roots will rot and cause permanent damage to your annuals.