What Does Giant Hogweed Look Like?
True to its name, giant hogweed is a giant in every respect. The mature plant is easy to identify. It grows up to 15 to 20 feet tall, its compound leaves can reach a width of up to five feet, and the flower clusters can have a diameter of up to two and a half feet. The stems and leaf stalks are sturdy, dark-reddish spotted, and hollow, between two and four inches in diameter. The wide, flat-topped flower clusters consist of many small white flowers. Flowers appear in June or July, and seeds set it August. Ideally you should identify a giant hogweed long before its towering and mature. The growing cycle can give you cues for its identification. As a biennial or perennial, the vegetative parts, basal-leaf rosettes, die back in the winter. The plant starts regrowing in the early spring. It can take a giant hogweed three to four years until flowering.
How to Get Rid of Giant Hogweed
When removing a giant hogweed, always wear protective clothing and cloves. Make sure that there is no gap between your sleeves and gloves that could exposes bare skin when you move your arms. Small plants can be manually pulled. Larger plants need to be dug up. If the plant is already large, make sure to remove it before it produces any seed. Digging up a mature giant hogweed is work, because it has a taproot up to two feet long, and you need to make sure to remove the entire root system. If the plant is mature, you must also protect your face, so it does not get exposed to any of the plant parts when you take it down. For plants that are too large to discard in the household trash, at a minimum dispose of the flower heads in order to prevent the seeds from spreading. Move the remainder of the plant to the compost, or to a location out of the reach of humans and pets where it can decompose. Mowing giant hogweed is not an option, because above-ground plant parts that are cut before the plant flowers and sets seeds may regrow.
