How to Grow and Care for German knotgrass

German knotwort (Scleranthus annuus) is indigenous to Eurasia and North Africa, but has been accidentally introduced and naturalized around the world. German knotwort is a “winter weed” that grows in dense mats covering rocky, sandy areas where few other plants can thrive.

Perennial knawel used to hold extremely high value, as it was a host plant for the Polish cochineal, an insect commonly used to make crimson dye. This wildflower grows in grasslands, sandy terrain, roadsides, and arable ground.

Knawel cushion is a strong and versatile plant, tolerant of dry conditions and ideal for rock gardens or as a ground cover. Its dense, bright green foliage forms a low mat-like mound with tiny flowers in late spring or early summer. The common name comes from the knob-like shape of the plant, which resembles the knobs of wool used by knitters in ancient times.

A common plant in grassland, particularly at higher altitudes. It may be in the form of a mat. Or a multi branched, spreading perennial herb. This species is under review, and new taxa are planned.

Scleranthus brockiei is a low-growing, mat-forming perennial known for its dense, cushion-like clumps. It showcases small, inconspicuous greenish flowers, which blend seamlessly into the vibrant green foliage. This hardy species thrives in gritty, well-drained soils, often found in alpine or rocky terrains where its drought-resistant nature allows it to persist in challenging conditions.