Henbit

Henbit is a winter annual weed that you may be noticing right now.  They are rapidly growing in your garden area and have little purple flowers.  When you pass a green space with a patch of purple, that’s likely henbit.  Henbit’s purple flowers and a square stem make it easily identifiable.  Plants germinate in the fall and overwinter.  The fall is the best time to control the plants.  Consider leaving them until you’re ready to plant.  They have shallow root systems, so they are easy to pull.  Early pollinators benefit from their flowers as there are just a few blooming plants now.  Soon everything will be in bloom and you can pull before it goes to seed.

https://www.canr.msu.edu/news/purple_deadnettle_and_henbit_two_common_garden_spring_weeds
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https://hnr.k-state.edu/extension/info-center/common-pest-problems/common-pest-problem-new/Henbit%20and%20Chickweed.pdf