The care information provided in this section represents the kind of practical advice is available for all the plants in this web site if you subscribe to the monthly customized newsletter Yardener’s Advisor.
Rose mallows like lots of moisture. Be sure to water them well when they are first planted and just before the winter freeze each year. When rainfall is irregular, or during drought periods, be sure to check them and water deeply every week or two if their soil appears dry. Allow a hose or irrigation system to drip water slowly on the soil over their root systems to soak it down to about 10 inches. A layer of mulch on the soil over their roots will help the soil retain moisture (see below).
For more information see file About Watering Equipment.
Feed rose mallows once a year in the spring. Sprinkle a handful of all-purpose organic granular fertilizer on the soil around their stems for the rain to water in. Some homeowners spray a dilute solution of fish emulsion or other liquid fertilizer on the foliage of their perennials occasionally during the hot summer months to boost their vigor. While this is not essential it is beneficial.
For more information see file About Fertilizers.
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A 2 to 3 inch layer of an organic material such as chopped leaves, grass clippings, or wood chips reduces water evaporation from the soil around rose mallows. Spread over landscape fabric laid down first, or directly on the soil, this mulch will also discourage weeds and protect the plants from injury from yard care equipment.
For more information see file on Using Mulch.
Protect young rose mallow plants from northern winters by mulching their roots heavily. Consider erecting a shelter of burlap or agricultural fleece to shield plants in locations exposed to winter winds and late frost. Be sure to allow plenty of air circulation around the plant. Never use plastic to wrap a plant.
For more information see file on Winter Protection For Plants.