The prolonged warm weather in the fall can extend growing time for many plants. It also can delay cooling of soils, altering the timing for applying winter mulch. Winter mulch is applied after soils have cooled. The purpose is to delay early spring growth that typically is killed by further cold weather. Winter mulches also help to retain moisture essential to winter root survival. In December, when night temperatures consistently drop to 20 degrees Fahrenheit, mound soil over the rose crown. The soil should be eight to 10 inches deep. Other mulches that can be used include pine needles, boughs, leaves or sawdust. Leave the mulch on until all danger of a hard frost has passed in spring.

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