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Sem Ash Leaf Spirea

Sorbaria sorbifolia 'Sem'

Nature Hills Nursery
  • Compact Dwarf Ash Leaf Spirea with Dense, Bushy Form Perfect for Low Hedges
  • Cold Hardy: Thrives in Zones 3-7
  • Grows 3-4 ft Tall and Wide
  • Showy White Blooms in Early Summer
  • Top Pick for Mass Planting
$8425
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Plant Size
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Plant Characteristics Cold hardy, Fast-growing, Fall Color/Interest, Deer-resistant, Hedge/Screen, Drought resistant, Heat Tolerant
Hardiness Zone 2a8b
Sunlight Full sun
Height 3-4 ft
Width 3-4 ft
Watering Needs Moderate
Preferred Soil Clay, Peaty
Growth Rate Moderate
Growth Habit Upright
Blooms In Summer
Flower Color White
Foliage Color Green
Fragrant Yes
Suitable Space Outdoors
Botanical Name Sorbaria sorbifolia 'Sem'
Species sorbifolia
Cultivar Sem
Class Rosales, Magnoliopsida
Does Not Ship To AK, HI, ID, MT, PR

Frequently Asked Questions

Does Sem Ash Leaf Spirea sucker or spread aggressively like other spireas?
  • Sem Ash Leaf Spirea forms a neat, compact mound rather than spreading aggressively like some other spirea varieties. This improved cultivar is bred to be dense and well-branched, creating a tidy shrub that stays put. It's an excellent choice for low hedges or accent plantings where you want controlled growth.

What are the basic care requirements for Sem Ash Leaf Spirea, including watering and soil?
  • Sem Ash Leaf Spirea thrives in any well-drained soil and adapts easily to various conditions. This hardy shrub tolerates partial shade well and requires minimal maintenance once established. Water regularly during the first season, then reduce frequency as it becomes drought tolerant. Shop at Nature Hills for this low-maintenance beauty.

How much sun or shade does Sem Ash Leaf Spirea need?
  • Sem Ash Leaf Spirea thrives in partial shade conditions. This adaptable shrub performs well in partly shaded gardens where it forms a neat, tidy mound with attractive textured foliage. Plant it where it receives morning sun and afternoon shade for best results.

Is Sem Ash Leaf Spirea cold hardy, and can it survive temperatures below -30°F?
  • Sem Ash Leaf Spirea is exceptionally cold hardy and specifically bred for northern climates. While the exact zone rating isn't specified, its reputation as a northern climate standout suggests excellent cold tolerance. For temperatures below -30°F, check your specific hardiness zone and consider additional winter protection in extreme conditions.

How do I control suckers on Sem Ash Leaf Spirea?
  • Sem Ash Leaf Spirea produces fewer suckers than older Sorbaria varieties due to its improved, compact breeding. Remove any unwanted shoots by cutting them at ground level in early spring. For persistent suckers, dig down and cut the connecting root. Shop at Nature Hills for this well-behaved dwarf selection.

When and how should I prune Sem Ash Leaf Spirea?
  • Prune Sem Ash Leaf Spirea in late winter or early spring before new growth begins. Since it blooms on new wood in July and August, early spring pruning won't affect flowering. Remove dead or crossing branches and lightly shape as needed to maintain its naturally compact form.

Is Sem Ash Leaf Spirea deer resistant or tolerant of urban conditions?
  • Sem Ash Leaf Spirea is generally deer resistant, as most Sorbaria varieties are not preferred browse. Its compact, dense growth habit and adaptability to various soil conditions make it quite tolerant of urban environments. Plant it as a low hedge or accent where deer browsing is a concern.

What size are the plants when shipped, and how long until they reach maturity?
  • Sem Ash Leaf Spirea ships as young nursery plants that reach their compact mature size of 3-4 feet tall and wide within 2-3 years. This dwarf variety grows relatively quickly in spring and summer. Plant in well-drained soil and expect creamy white blooms by the second season.

Can Sem Ash Leaf Spirea tolerate dry soil, clay, or poor drainage once established?
  • Sem Ash Leaf Spirea needs well-drained soil and won't tolerate poor drainage or consistently wet conditions. While it's quite adaptable once established, it performs best in average garden soil rather than heavy clay or soggy areas. Improve drainage in clay soils by adding compost before planting.
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