Propagation of Malva Sylvestris

Softwood Cuttings

• Although common mallow is easy to propagate by taking 4- to 5-inch cuttings from flexible new growth at any time of the year, the plant roots fastest in spring. Dip the stems in rooting hormone before planting them in pots or trays filled with sand or a well-draining potting mixture. With consistent, light moisture and indirect light, cuttings usually root in three to six weeks. Plant the rooted cuttings in 1-gallon containers and let them mature until the following spring.

Division

• Common mallow is best divided in spring, as the plants have deep taproots and don't always tolerate division and transplanting in fall. To divide common mallow, cut the plant down to about 6 inches from the ground. Dig the entire plant, along with the attached clump of soil, digging deeply to avoid root loss. Cut the plant into smaller sections, each with at least four or five shoots and several healthy roots. Transplant the sections immediately into a spot with well-draining soil and full sun. Plant the sections at the same depth they were originally planted, as planting too deep may cause the plant to rot.

Seeds

• Common mallow grows easily from fresh seeds harvested from dry seed pods in fall. Gather the seeds just before they fall from the plant and plant the seeds directly in the garden right away. This is the most dependable way to plant mallow seeds. You can also dry the seeds, store them for the winter and plant them indoors 12 weeks before the last expected frost in your area. Before planting dry seeds, soften the outer coating by soaking the seeds in warm water for an hour. Common mallow often self-seeds with no assistance, but it is not an invasive plant.

Growing Conditions

• Common mallow tolerates most well-draining soils, including sand, clay or loam, and a wide range of pH. It performs best in average, well-draining soil. Full sun is best in most climates but the plant benefits from light afternoon shade in areas with hot summers. If you grow more than one common mallow, allow 3 to 4 feet between each plant.