Scientific Name: Clethra alnifolia
Common Name: summersweet, sweet pepperbush
Family Name: Clethraceae
Origin: Canada - eastern, U.S. - northeast
Hardiness Zone: Zone 3: (-40 to -34 °C)
Plant Type: Shrub - deciduous
Mature Size: 2 - 3m x 2 - 3m (height x width)
Habit: Upright
Form: Round
Texture: Medium
Landscape Uses: Attract butterflies, Fragrance, Mixed shrub border, Summer interest, Woodland margin
Exposure: Part sun/part shade, Filtered shade
Soil or Media: Acidic, Humus rich
Leaves: Simple, Alternate, Soft flexible, Glabrous, Elliptic, Obovate, Dentate, Serrate
Flowers: Raceme, White, Pink, Jul-Aug-Sep
Fruit: Capsule, (Accessory tissue), Brown, Oct-Nov, (Persistent)
Key ID Features:
Suckering; leaves alternate, serrate except near the base with less than 40 teeth per side, most obovate, 4-10cm long x 2-4cm wide; flowers fragrant, white (or pink cv.), racemes, <15cm, late summer. Winter ID: leaf scar almost circular (notched at bud), raised bundle scars in horse-shoe shape; lateral buds red, wart-like, 0.5-2mm long; terminal bud conical 5-7mm long; capsules brown, oval, persistent.