Galeopsis segetum, commonly known as downy hemp-nettle, is a species of flowering plant in the sage family, Lamiaceae. It grows as a weed in arable ground throughout Europe. Although superficially resembling the stinging nettle it is of a different family and does not sting.
Downy hemp-nettle has strong disease resistance and is generally not prone to illnesses. However, it can be affected by pests and diseases present in its surroundings, and these infections are usually mild. Its care level is moderate. Regular pruning is needed to keep a neat appearance and support healthy growth, and fertilizing can help encourage flowering. Downy hemp-nettle is appropriate for anyone with outdoor space, such as a garden or patio, and does not require extensive care experience. It may need more attention if grown indoors.
How to keep Galeopsis Segetum.
Light
Downy hemp-nettle is native to habitats with dappled light, such as forest understories or rocky sites that provide natural shade. It does best in partial sun but can also adjust to full-sun conditions.
Water
Downy hemp-nettle flourishes in moist environments and requires consistent but moderate watering, usually about twice a week. This herbaceous plant thrives in well-draining soil and is best grown outdoors, where it can benefit from natural rainfall to support its growth during the active season.
Temperature
Downy hemp-nettle can tolerate a broad range of temperatures, though its range may still be constrained by particular combinations of moisture and heat. It performs best in warm summer conditions with sufficient rainfall or irrigation. Extended stretches of cloudy, rainy weather or prolonged high temperatures can raise the risk of the plant dying. During winter, appropriate protection from cold can enhance its survival chances.
Fertilizer
Downy hemp-nettle responds well to regular, light fertilizer applications to encourage healthy leaf development. You should feed Downy hemp-nettle about once a month during the summer. Nitrogen is important for foliage, and providing nitrogen-rich sources helps Downy hemp-nettle thrive.
Pruning
Downy hemp-nettle is characterized by its hairy leaves and tubular flowers. To promote better air circulation and light penetration, prune the plant in early to late spring by removing any dead or overcrowded stems. Using clean, sharp tools is crucial to prevent infection and ensure the downy hemp-nettle remains healthy and attractive.
Botanical profile.
- Plant Type
- Herb
- Life Cycle
- Annual
- Genus
- Galeopsis
- Family
- Lamiaceae
- Hardiness Zone
- 5-9
- Mature Height
- 20 cm to 49 cm
- Mature Spread
- 15 cm to 30 cm
- Leaf Color
- Green, Dark Green
- Leaf Type
- Semi-evergreen
- Flower Color
- Yellow, White
- Flower Size
- 2.03 cm to 3.05 cm
- Bloom Time
- Summer
- Planting Time
- Spring, Summer
- Harvest Time
- Late summer, Early fall, Mid fall
- Native Area
- Germany, Italy, Spain, Switzerland, Denmark, Slovakia, Netherlands, United Kingdom, Greece, Croatia, Slovenia, Belgium, France
Other names.
Reader questions.
What are the sunlight requirements for Downy hemp-nettle (Galeopsis segetum)?
Downy hemp-nettle (Galeopsis segetum) thrives in conditions ranging from partial to full sun. It needs about 3-6 hours of sunlight each day to fall into the partial sun category. For the plant to be considered in full sun, it requires more than 6 hours of direct sunlight. It's important to observe the movement of sunlight in your garden to identify the ideal spots that offer a balance of light and shade, ensuring the plant's well-being.
