Mount St. Helens Plum
Mount St. Helens Plum (Prunus cerasifera 'Frankthrees')
Mount St. Helens Plum (Prunus cerasifera 'Frankthrees') is a standout ornamental tree valued for its rich purple foliage and soft pink spring flowers. Known in the trade as 'Thundercloud,' this cultivar offers long-lasting color and a refined canopy shape, making it a striking choice for residential yards, street plantings, and garden accents.
Distinctive Features
This cultivar begins the season with a profusion of pink blooms in early spring, often before the leaves emerge. As the flowers fade, deep reddish-purple foliage fills the canopy and remains vivid throughout the growing season. Mount St. Helens Plum typically grows 15 to 25 feet tall and wide, forming a rounded, symmetrical habit that brings both structure and color to the landscape.
Growing Conditions
- Sun Exposure: Full sun is essential for the best foliage color
- Soil Type: Well-drained loam, clay, or sandy soil
- Soil pH: Slightly acidic to neutral
- Water Needs: Moderate; drought tolerant once established
- USDA Hardiness Zones: 5 to 9
Ideal Uses
- Accent tree for lawns or front yards
- Urban street tree or parkway planting
- Focal point in foundation beds or cottage gardens
- Contrast tree in mixed foliage designs
- Seasonal interest near patios and walkways
Low Maintenance Care
- Prune after flowering to maintain its form
- Water during extended dry periods
- Apply mulch around the base to retain soil moisture
- Monitor for leaf spot or aphids in humid regions
- Performs best in full sun with well-drained soils
Why Choose Mount St. Helens Plum
- Consistent deep purple foliage from spring through fall
- Pink blossoms provide early-season color and charm
- Compact, rounded canopy fits a wide range of settings
- Low-maintenance and drought tolerant once established
- Creates a vibrant focal point that stands out in any season
Mount St. Helens Plum offers long-lasting foliage color, dependable flowering, and a compact form that makes it a compelling focal point for any landscape looking to add bold contrast and seasonal beauty.

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