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German knotgrass

Scleranthus annuus

Also called Annual knawel, German knotweed, German moss, Knawel, German Knotgrass, Annual Knawel, Annual Scleranthus

German knotgrass
Photo: Fornax at German Wikipedia, Public domain

German knotgrass is a low, spreading annual or biennial weed of disturbed, sandy or stony ground. It is a plant of waste places and fields rather than a garden ornamental, and it is rarely grown on purpose.

Family
Caryophyllaceae (Pink & carnation family)
Grows as
Annual
Light
Full sun
Water
Tolerates dry conditions; water only in prolonged drought.
Soil
Sandy or gravelly, well-drained soil; poor soils suit it well.
Temperature
Hardy in temperate climates; tolerates cold winters.
How easy
Easy
Native range
Macaronesia, Europe to C. Siberia, Medit. to Iran and Arabian Pen.
Climate
temperate

About

Scleranthus annuus is a species of flowering plant in the family Caryophyllaceae known by the common names German knotweed and annual knawel. It is native to Europe, Asia, and North Africa, and it is known throughout the rest of the temperate world as an introduced species and a common weed. It grows in many types of habitat, often in disturbed areas.

Where it grows

It grows in soil pockets among rocks, on bare places, on disturbed sandy soil on heaths, in arable fields, in sand pits, in quarries, and occasionally on shingle on the coast or beside rivers.

Other Scleranthus plants

Two Flower Knawel · Scleranthus brockiei · Scleranthus diander · Scleranthus fasciculatus · Perennial knawel · German knotgrass

Text excerpted from the Wikipedia article Scleranthus annuus by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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