Growing Panicum
Latin Name Pronunciation: pan' ih-kum
Although native to a wide variety of habitats in temperate and tropical areas globally, the Panicum genus in horticulture is predominantly represented by North American native Panicum virgatum species and cultivars. This exceptionally deep-rooted, upright, clumping, warm-season Grass has great ecological value. Switchgrass, as it is commonly called, actively grows from June into early September, remains colorful in hot weather, and stands tall through winter dormancy. Its ease of care, deer-resistance and adaptability to a wide range of soil types, nutrient and moisture levels – and its beauty – make it invaluable in both ornamental gardens of any style and in habitat plantings.
Growing Panicum
Plant the crown just at soil level, or slightly above if you will be adding mulch. Will naturalize by self-sowing in moist, open areas, with the seedlings differing from the cultivar parent. Useful near roads and seashores as it tolerates salt spray.Light: Sun
Watering: Low-water needs. Drought-resistant once established; tolerates occasional inundation and seasonally wet soil.
Fertilizer: Not normally needed as it grows well in poor, unimproved soil. Mulch with previous season’s growth, sterile straw, or gravel, if possible. If mulching with wood products, apply sparingly and do not let it pile up around the crown.
Soil:Grows just about anywhere, from infertile sandy soils to fertile clay.
Pests/Diseases: Generally pest- and disease-free, although voles may feed on crown. Excess moisture-retaining wood product mulch can foster fungal diseases.
Dividing/Transplanting: If the center of the plant dies out as it ages or is hollowed out by voles, dig up the entire clump with a sharp sturdy spade and cut into sections for replanting. Dividing and transplanting are best done in spring when plants are actively growing but may be done when plants are still dormant.
End-of-Season Care: Switchgrass really stands up to winter’s fury. Refrain from cutting back Panicum Grass in the fall, as it provides habitat and food for numerous birds and beneficial insects and animals, and will enliven your landscape with fluffy seed heads aglow in the low winter sun. If some stems are knocked askew after storms, judiciously snip them for dried bouquets. Although you can cut clumps back when they turn brown in fall, we prefer to wait until spring to chop foliage down to 4-6" and use it as mulch.