What Is That Purple Weed Growing in the Middle of My Lawn?

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What Is That Purple Weed Growing in the Middle of My Lawn?
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Weeds are undesirable plants growing in gardens and lawns. Weeds generally spread very rapidly if left uncontrolled and compete with desired plants and turf for nutrients and water. It is often very easy to identify weeds by their flower colour.

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Henbit (Lamium amplexicaule) is a purple weed from the mint family. The weed is frequently found in vegetable crops, lawns, pastures and disturbed sites. The plant is an annual or biennial broadleaved weed.


The weed has a mature height of about 1.3 feet with 1-inch-long, hairy, egg-shaped foliage. The plant blooms between March and August with clusters of ½- to ¾-inch-long, tubular, purple-coloured flowers. Some henbit varieties are self-pollinating, and the smaller flowers on these plants do not open.


The best time for controlling henbit is during fall when plants are immature and small. Effective herbicides include dicamba, 2,4-D and MCPP. Pre-emergence control herbicides include simazine, bensulide and surflan.

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