University of Maryland Extension

Henbit

Henbit
Lamium amplexicaule

henbit with flower inset

(More lawn weeds)  (Control Options)  (General Weed Gallery)

Lifecycle:  winter annual, less than 12-in. tall; noticeable in spring for pink to purple flowers
Growth habit: square stems; leaves opposite, scalloped, and rounded; lower leaves with petioles, upper leaves half encircling the stem; pinkish-purple, lipped flowers in whorls in the axils of upper leaves; fibrous root system that does not creep along the ground
Reproduction:  seed germinating in early fall or early spring
Conditions that favor growth: mowing the lawn too short and improper fertilization

Cultural control: Maintain healthy, dense turf that can compete and prevent weed establishment.
Mechanical control: Hand pulling or using an appropriate weeding tool are the primary means of mechanical weed control in lawns. This is a viable option at the beginning of an infestation and on young weeds. Hand pulling when the soil is moist makes the task easier. Weeds with tap roots like dandelions or have a basal rosette (leaves clustered close to the ground) like plantain are easier to pull than weeds such as Bermudagrass (wiregrass) or creeping Charlie (ground ivy) that spread with stolons or creeping stems that root along the ground.
General chemical control: (lawns) Spot treat weeds with a liquid, selective, postemergent, broadleaf weed killer applied when weeds are actively growing. Look for a combination product with the following active ingredients:
2, 4-DMCPP (mecoprop), Dicamba (be careful when using around tree and shrub roots) or Triclopyr. 

Organic control:

For a glossary of herbicide terms and additional information see: control options 

Publication: (PDF) TT 49 - Broadleaf Weed Control in Established Lawns 

 

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