Urtica urens (annual nettle) is an annual, monoecious plant that is reproduces through seeds. It has a pivoting root and stinging hairs that produce rashes. This plant love nitrogen and it specific for soils that are rich in humus and well taken care of.
Common names: annual nettle, dwarf nettle, small nettle, dog nettle or burning nettle.
The stem can grow 60-cm high and it has branches starting from its base. It has a square shape and stinging, rash-producing hairs, just like the leaves.
The cotyledons are small, with small lobes on their tips and with short petioles. The first leaves are oval-rounded, regularly lobed and serrated. The terminal lobes are rounded. The following leaves are oval-elliptical and lacy-serrated.
The real leaves are placed on an opposite position from one another. The first leaves are oval-rounded, regularly lobed and serrated. The terminal lobes are rounded. The following leaves are oval-elliptical and lacy-serrated.
The flowers are barely visible, green, grouped in bent or vertical panicles that are located on the leaves’ axilla.
The germination period is spring until late summer.
The blossoming period is from June until autumn. The plant can produce between 100 to 1300 seeds.
How to fight this pest plant
The herbicides that are recommended when fighting the annual nettle are: Buctril Universal, Cerlit, Equip, Kerb, Roundup.