This is a perennial, but is not usually a problem weed. It is included here as is sometimes appears, and is similar to the Chickweeds, to which it is related. It grows in most soils that are moist.
All parts are edible and a decoction has been used to treat snakebites and colds; the crushed fresh topgrowth can be applied to the skin to treat pimples and injuries.
The leaves are ovate and end in a point, most have no stalk (sessile).
The white star-like flowers open in May and June with petals shorter than the sepals

Weedkillers to use:-
A residual herbicide to supress germination.
Paraquat, Diquat, contact action killing top growth, apply before flowering.

Follow these links for further details on Weeds, Weed Removal and Weed Prevention.