Broadleaf Weed – Knawel

(Scleranthus annuus)

Knawel – also referred to as German Knot-grass and Annual Knawel – is a perennial weed found in low maintenance turfgrass commonly in dry, sandy soils. Scleranthus annuus is often found growing in thin lawns, glades and along railroads and roadsides. Knawel can be found throughout much of the United States.

Identifying Knawel -

Knawel is a winter or summer annual that can be identified by its low-growing to horizontal growth habit, as well as its extensive branching. Its leaves are sharply pointed at the tip and joined at the node by a translucent membrane. The leaves also may appear to be whorled when new shoots are expanding from leaf axils.

Blooming from March to October, Knawel features small, petal-less flowers with five green sepals.

Knawel Control -

Knawell’s grass-like appearance and horizontal growth habit often enables it to get established in turfgrass without being noticed. Additionally, cultural weed control methods such as proper mowing are largely ineffective because Knawel typically grows beneath normal lawn mowing heights. Professionally selected and applied herbicides are the best method for complete removal.


Scotts LawnService uses a selective systemic weed control program to fight Knawel in your lawn, which ensures the herbicide is moved throughout the weed, killing it completely root and all.

Scotts LawnService is the trusted industry leader for professional quality lawn care. Our exclusive lawn care products include professional-grade systemic herbicides that are designed to control tough-to-kill weeds like Knawel. Our lawn service teams are made up of highly trained, industry-certified professionals. Contact a representative today for Knawel control options available in your area and to learn how you can enjoy a lush, thicker lawn that only Scotts LawnService can deliver.