Mulching is one of the most important ground management activities that can be performed. It helps insulate the roots of ornamental plants from winter freezes and summer heat while minimizing soil-borne foliar diseases and weeds. The type of mulch used depends greatly on availability and cost. The mulch should be applied 3 to 5 inches thick under the entire canopy of ornamentals. No more than 5 inches of mulch should be applied, because it reduces oxygen supply to the root system and encourages the roots to grow into the mulch layer where they become more susceptible to drought and freeze damage. The use of landscape fabrics is recommended for non-irrigated areas. Mulch materials should be added to the site at least twice a year. Pine bark, hardwood bark, compost, pine needles and decayed sawdust are appropriate materials.

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