Mallow (Malva neglecta) is a spreading annual, biennal or perennial, 4 to 24 inches tall on slightly hairy stems. The leaves are alternate, shallow palmate-lobed (e.g. somewhat heart to kidney shaped). Flowers are pale pink to nearly white, in clusters of 1 to 3.
Originally from Eurasia, common mallow is found in fields, gardens, newly seeded lawns and disturbed areas, from 4,500 to 7,000 feet in Colorado.
Biology and spread
Seeds germinate throughout the growing season.
May serve as a reservoir for a number of plant viruses.
Cultural, physical and mechanical control: Prevent infestations with weekly mowing. Lawns should be mowed at a 3 inch height. Increase turf density with proper mowing, fertilization, watering and other cultural practices.
Chemical control: Roundup has not been sufficiently effective to control this weed.