Plant Profile: Medicago lupulina

Medicago lupulina, commonly referred to as black medic or hop clover, typically thrives in disturbed environments such as lawns, fields, and pastures. This summer annual broadleaf plant grows low to the ground and features trifoliate leaves, with a distinctive spur on the central leaflet. At the end of a stem that rises from the leaves, you will find yellow flowers clustered in a rounded formation, which eventually develop into black seed pods when mature. To manage its growth, hand pulling or the use of weeding tools is recommended to effectively remove its substantial taproot. Black medic flourishes in dry, nutrient-deficient soils, so addressing these soil issues in your garden or lawn can help reduce the presence of this weed.

The flower heads are globe-shaped and consist of a compact cluster of 15 to 50 tiny yellow flowers. Each leaf is divided into three leaflets, known as trifoliate; the central leaflet is connected to the stem by a short stalk, while the two outer leaflets attach directly to the stem.

This vigorous plant produces dense clusters of seed pods following its flowering period. Its root system features a coarse, branched taproot that may develop nodules, which contribute nitrogen to the surrounding soil.

Additionally, various animals may graze on this plant.

In terms of pests and diseases, it is important to note that black medic is considered an aggressive weed.