|Bidens frondosa (devil's beggarticks) is an annual native plant found naturally in low meadows but also a common weed of gardens. The plants emerge in mid spring, flowering in mid to late summer, then producing seeds that stick to clothing.
Despite being an annual, the plant can produce very tough root systems. Cold-pile composting is safe before flowers are produced.
|Wikiversity is collecting bloom time data for Bidens frondosa on the Bloom Clock|