Buttonweed Malva neglecta

Common Mallow is a flowering, branching vine that grows in any areas where the soil has been disturbed often reaching 3 feet in length. In open areas, it tends to form a mat of leaves and stems across the ground that can extend several feet. It is from the Mallow family, which includes a number of desirable plants, most notably cotton, hibiscus, and okra. One species of this family (Althaea officinalis) is actually the original ingredient in the making of marshmallows. Common Mallow is considered an invasive weed in some states. 

Common Mallow is a herbaceous perennial, although it is often referred to as an annual, winter annual, or biennial plant because it can be found growing all year. The Common Mallow prefers full sun, moist to slightly dry, fertile loamy soil. It will adapt to different soil types. During a drought, some of the lower leaves on the vine may wither away. This plant can survive irregular mowing or occasional attacks from a weed-whacker.

Mallows only reproduce by seed and their seeds have a very thick coat which slows germination but allows them to survive for quite some time in the soil.  If the seed coat gets nicked or damaged in any way, water can penetrate and the seed will germinate.

Seedlings send out taproots that quickly becomes woody and are difficult to remove by hand or even with tools. Removing seedlings before they have less than four true leaves is best. Removing plants before they flower and go to seed is essential to keeping the seeds out of the soil for future seasons. Solarization and flaming are not effective weed treatments.

The Common mallow is easily confused with the Common Carolina geranium weed.  However, the geranium weed has more deeply-dissected leaves.

Diseases, Insect Pests, and Other Plant Problems:

Susceptible to rust fungus.