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Twin Cress

Twin cress is an annual weed which can germinate at any time of the year, though typically it establishes mainly in spring and autumn. As a seedling, it is a rosette rather than a scrambling plant.

Each leaf is composed of several leaflets, and each leaflet has a few lobes. A distinctive characteristic of twin cress is that it is not symmetrical, unlike most other weeds. As twin cress becomes more mature, it sends out prostrate stems, which can form quite extensive mats on the ground if left long enough.

It is best to treat it early with MCPA which will retard the growth of clovers for several months. In young lawns it is tolerant of mowing but can be controlled by several selective turf herbicides.