One of the most important things you can do in order to achieve a beautiful landscape is to know some of the best landscaping plants you can use. The choices of landscaping plants are limitless. Gardeners looking for an easy-to-grow multi-bloomer for landscaping garden should look no further than the popular annual impatiens. With flowers that range from shades of red and pink to orange, white and lavender, most impatiens grow in compact clumps of 6 to 18 inches tall, and some varieties have unusual variations in leaf texture and color. Impatiens work well in containers and in beds, best planted after the threat of frost has passed.