Impatiens often reseed in the garden, but the seedlings will gradually return to producing tall plants with a mix of colors unlike those originally planted. Impatiens range from 8 inches to 2 feet tall. Many cultivars will be taller than descriptions in catalogs in hot southern summers. Heat-tolerant cultivars will remain more compact. Flowers are from 1 to 2 inches across.
Taller plants produce larger flowers.
Flowers can be single, semi-double, or fully double blooms that look like miniature roses. In addition to the many brilliant solid colors, impatiens are available with markings in star, picotee and mosaic patterns. Blitz' series has very large 2 inch blooms on uniform compact plants. Carousel' has the largest percentage of double blooms of any double impatiens. Dazzler' series grows 8 to 10 inches tall and is best in shade.