The Blitz series of impatiens grow tall. Blitz Mango, Salmon, Red, and White grow in the 18" range. Jungle Gold, Rockapulco Appleblossom, and Rockapulco Orchid can grow up to 20". Infinity
Pink Frost, Infinity Orange Frost, and Infinity Crimson grow to the 14" size. These plants do fine in window boxes, hanging planters, as border plants, or in ground.