Species guide
Common ragweed
HarmlessAmbrosia artemisiifolia
What does Common ragweed look like?
Up to about 1 m, with soft, deeply divided fern-like green leaves and inconspicuous green flower spikes at the stem tips.
Is Common ragweed dangerous?
Not toxic to touch, but a leading cause of hay fever — its wind-blown pollen triggers seasonal allergies for millions.
What should I do about Common ragweed?
Pull or cut it before it flowers to reduce pollen; manage allergy symptoms during late summer.