Type: Broadleaf perennial
Size: To 6 feet tall and 3 feet wide
Where It Grows: Garden areas with rich, moist soil
Appearance: This garden weed has sawtooth-edge leaves and yellowish flower clusters covered with stinging hairs.
Control: Mulch to prevent nettle. Dig out weeds or treat with a postemergence herbicide.
Test Garden Tip: Always wear gloves when working around this plant (the sharp hairs can irritate skin).