New Guinea impatiens also make a great impact when used in large containers.There are many varieties to look for, including the 'Sunshine' hybrids, with their variegated foliage and bright-colored flowers of white, pink, red, orange, lavender and purple. Planting: New Guinea impatiens grow best in the shade; in cooler areas, they will tolerate full sun, though too much sun can scorch the leaves. They are not as cold tolerant as geraniums or petunias, so plant when night temperatures reach above 45 degrees Fahrenheit.