Although perennial goldenrod (Solidago canadensis), which has similar yellow flowers, often gets mistakenly blamed, common ragweed is the true culprit of late-summer allergies. It can grow six feet ...

Ask corn growers what their No. 1 weed problem is today, and it’s likely at least one of these three – Palmer amaranth (pigweed), waterhemp or common ragweed – will be listed in their response.

Scientists say the impact on human health across Europe of the invasive ragweed plant may be "seriously underestimated". Allergies caused by common ragweed (Ambrosia artemisiifolia) affect around ...