Why all the winter annuals this year?

April 23, 2016 9:48 AM
Blog Post

Had a question why winter annuals, specifically henbit, are so thick this year.  Two main factors: 1) ample moisture at the end of last year's growing season, and 2) a relatively mild winter.  Most winter annuals emerge in late August-September, in many years we don't have enough soil moisture to trigger germination.  That obviously wasn't an issue last year.  Frequently there can be relatively high mortality rates of winter annuals during the winter, but the combination of early-emergence and a mild winter would have minimized those losses.  Now specifically what favored henbit this year, I'm not quite smart enough to know that.



Henbit has opposite leaves with no petioles, and a characteristic odor of the mint family.

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Bob Hartzler Professor of Agronomy

Dr. Bob Hartzler is a professor of agronomy and an extension weed specialist. He conducts research on weed biology and how it impacts the efficacy of weed management programs in corn and soybean. Dr. Hartzler also teaches undergraduate classes in weed science and weed identificatio...