50 WHITE MARSH MALLOW Althea Officinalis Flower Seeds BLOOM TIME: Summer HARDINESS ZONE: 3 - 9 PLANT HEIGHT: 24 - 48" . . . PLANT SPACING: 15 - 18" LIGHT REQUIREMENTS: Sun . . . SOIL / WATER: Wet Marsh Mallow is an herbal and medicinal plant. It has leaves like a maple, and attracts bees, butterflies, and birds.