Latin: Galeopsis spp.

Other names: Common hempnettle, red hempnettle

Family: Lamiaceae

Source: with Weed title

Edited with Weed title

Hempnettle is a common weed found in the United Kingdom that belongs to the mint family (Lamiaceae). It is also known as common hempnettle or red hempnettle. This weed can be identified by its square stems, opposite leaves, and clusters of pink to purple flowers.

Hempnettle is an annual or biennial plant that typically grows upright, reaching heights of up to 90 centimeters. Different species of hempnettle exist, with the most common ones in the UK being Galeopsis tetrahit and Galeopsis pubescens.

Identifying Hempnettle

Hempnettle possesses several distinct features that help distinguish it from other similar-looking plants. The leaves of hempnettle are opposite, toothed or lobed, and have a rough texture. The stems are square in cross-section, which is a characteristic feature of the mint family.

The flowers of hempnettle are tubular and arranged in dense clusters at the upper leaf axils. They can range in color from pink to purple, and sometimes white.

The Challenges of Hempnettle

Hempnettle can be a problematic weed in agricultural fields and gardens. Its ability to produce abundant seeds and its competitive growth make it a challenging species to control. Hempnettle competes for resources such as nutrients, water, and sunlight, leading to reduced crop yields .

One of the difficulties with hempnettle is its adaptability to various soil types and its ability to tolerate different environmental conditions. It can quickly establish itself and spread if not managed effectively.

Proper timing of herbicide applications is crucial for effective control.