Impatiens (Impatiens wallerana) has been one of the most popular annual gardening plants in the U. S. for some time now, due to its ability to bloom continually, including in shady conditions. Impatiens grow to 6 to 24 inches tall, depending on the variety. This shade-loving plant comes in various shades of pink, rose, red, lilac, purple, orange, and white.
Description
It is a flowering herbaceous perennial plant growing to 15–60 cm (6–24 in) tall, with broad lanceolate leaves 3–12 cm long and 2–5 cm broad. Leaves are mostly alternate, although they may be opposite near the top of the plant. The changeable, simple leaves are stalked 1.5 to 6 cm long. The leaf blade is ovate to broadly elliptic, sometimes obovate, 2.5 to 13 inches long and 2 to 5.5 inches wide, green and sometimes spotted or pink or reddish on the underside. Leaflets are missing.[3]
The hermaphroditic, zygomorphic flowers are profusely borne, 2–5 cm diameter, with five petals and a 1 cm spur. The seedpod explodes when ripe in the same manner as other Impatiens species, an evolutionary adaptation for seed dispersal. The lower sepals are slightly boat-shaped and narrow suddenly in the 2.8 to 4.5 inches long, thread-like curved, but not curved back spur. The stems are semi-succulent, and all parts of the plant (leaves, stems, flowers, roots) are soft and easily damaged.[4]
Cultivation

Double Impatiens
Although perennial in frost-free growing conditions, it is usually treated as a half-hardy annual in temperate regions (though pot-grown plants can be successfully overwintered indoors). It is one of the most popular of all bedding plants for parks and gardens worldwide, typically grown in containers but also in bedding schemes. Propagation is by seed or stem cuttings (which often root readily in water)