By Sharon Bokan
Colorado State University Extension Boulder County 

Winter weed management

Series: CSU Extension Boulder County | Story 15

February 17, 2021

Courtesy Photo

Winter annuals such as this cheatgrass seedling can be hoed or pulled when the soil is not frozen. Others include prickly lettuce, redstem filaree, and mustards (flixweed, blue mustard and tumble mustard).

While this may not seem to be the best time of year for weed management, it is a good time to start dealing with winter annual and biennial weeds and planning your strategy for the 2021 growing season.

Winter annual weeds can germinate in the late summer, fall or winter, over winter and start actively growing again in the spring. Winter annual weeds finish growing and produce seed by early sum...

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