Garden mums (Chrysanthemum sp.) that have finished flowering can be cut back to two to three inches. Apply a layer of mulch over the top for protection through the winter. It is also okay to leave the top growth intact through winter.
This can provide insulation for the crown. Regardless of fall maintenance practices, garden mums should not be allowed to dry out during the winter. If there has not been any precipitation in the form of rain or snow, it may be necessary to apply supplemental water.
