True to its name, both the stem and lower surface of the leaves of this plant harbor stinging hairs, tiny petal-less yellow-green flowers are born in long slender panicles at the leaf axils from June through late August, plants are slightly lightly dioecious - most plants bear primarily male or primarily female flowers, broad serrated leaves droop slightly from the central stem, spreads by seed and rhizomes, host plant to a wide variety of beautiful butterflies including the Question Mark (Polygonia interrogationis), Eastern Comma (P. comma), Milbert's Tortoise Shell (Nymphalis milberti), Painted Lady (Vanessa cardui), Red Admiral (Vanessa atalanta) and others. In our experience, the sting is reasonably painful, but short-lived. Best to use gloves when handling this plant.
Native Range: Newfoundland west through s ON with some populations in the Canadian Rockies, south to VA, NM, AZ, & c. CA
Germination - Very Easy: No treatment required. Cover seed lightly.
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