Annual that self sows in the garden. This North American Native ornamental is super vigorous, thriving in poor, dry soil. Snow on the mountain quickly grows to the size of a large shrub in the course of one summer, creating a soft white cloud of variegated foliage. Thanks to its rapid growth habit and bushy nature, this is an ideal candidate for a quick natural hedge or background plant. CAUTION: The sap from this plant may cause skin irritation in certain individuals. Use caution when harvesting! Do not eat, as it is mildly toxic.