Heavy Metal Switchgrass (Panicum virgatum 'Heavy Metal') is a striking ornamental grass prized for its metallic blue-gray foliage and strong, upright growth habit. Growing approximately 4-5 feet tall, it forms a narrow, vertical clump of stiff foliage that maintains its upright form throughout the growing season. Its distinctive blue coloration provides excellent contrast against green, golden, and burgundy foliage in the landscape.
In late summer, airy pinkish flower panicles emerge above the foliage, creating a soft contrast against the rigid, upright leaves. As fall progresses, the flowers mature to tan and the foliage develops attractive golden-yellow tones. The dried stems and seed heads can be left standing through winter to provide additional texture, structure, and wildlife value.
Heavy Metal is an excellent choice for mixed borders, mass plantings, screening, rain gardens, naturalized areas, or as a vertical accent. As a cultivar of native switchgrass, it is adaptable, durable, and easy to grow in a wide range of landscape conditions.
More About Heavy Metal Switchgrass
- Low Maintenance
- Moderate Growing
- Perennial Ornamental Grass
- Native Cultivar
- Metallic Blue-Gray Foliage
- Mixed Border, Mass Planting, Screening, Rain Garden, Naturalized Area, Accent
- Strong, Upright Habit
- Airy Late-Summer Flower Panicles
- Provides Winter Texture and Structure
- Drought Tolerant Once Established
- Deer Resistant
- Provides Wildlife Value
Height: 4-5 Feet
Spread: 2-3 Feet
Hardiness Zone: 4-9
Characteristics
- Sun Exposure: Full Sun to Part Sun (best form and color in full sun)
- Season of Interest: Summer, Fall, Winter Texture
- Soil Moisture: Dry to Moist, Adaptable
- Attributes: Clumping, Upright, Narrow
- Foliage Color: Metallic Blue-Gray, Turning Golden-Yellow in Fall
- Flower Color: Pinkish, Maturing to Tan
Care & Maintenance Tips
Planting:
Plant in full sun for the strongest upright growth and best blue-gray foliage color. Heavy Metal can tolerate some light shade, but too much shade may cause weaker or floppier growth. It is highly adaptable to different soil types and can tolerate both periodically wet and relatively dry conditions once established.
Watering:
Water consistently during the first growing season to establish a strong root system. Once established, Heavy Metal is drought tolerant and generally requires supplemental watering only during extended periods of hot, dry weather.
Fertilizing:
Heavy Metal generally requires very little fertilizer. If needed, apply a light application of balanced slow-release fertilizer in early spring. Avoid excessive fertilization, which can encourage overly vigorous or floppy growth.
Pruning:
Leave the dried foliage and seed heads standing through winter for added texture, structure, and wildlife value. Cut the entire plant back to approximately 4-6 inches above the ground in late winter or early spring before new growth begins.
