Philadelphus Avalanche (Mock Orange)

Regarded as one of the most fragrant of all Mock Oranges, Philadelphus ‘Avalanche’ is a multi-stemmed deciduous shrub of great beauty when in bloom. In late spring to early summer, its pleasantly arching branches bear clusters of cup-shaped, 4-petaled, white flowers, 1 in. across (2.5 cm), at their tips.

Regarded as one of the most fragrant of all Mock Oranges, Philadelphus 'Avalanche' is a multi-stemmed deciduous shrub of great beauty when in bloom. In late spring to early summer, its pleasantly arching branches bear clusters of cup-shaped, 4-petaled, white flowers, 1 in. across (2.5 cm), at their tips. The blossoms stand out against the foliage of oval, dark green leaves. Introduced in 1896, 'Avalanche' is a lovely flowering shrub that deserves a spot where its fragrance can be enjoyed.

  • Grows with an upright, arching habit to 4-5 ft. tall (120-150 cm) and 5-10 ft. wide (150-300 cm).
  • A full sun to light shade lover, this plant is best grown in average, medium moisture, well-drained soils. This plant is not fussy about soils as long as they have good drainage. Drought tolerant.
  • Generally pest and disease free. Watch for leaf spot, canker, powdery mildew and rust.
  • Great for shrub borders, foundation plantings, and informal flowering hedges.
  • Blooms on previous year’s wood, so prune immediately after flowering. May be cut to the ground to rejuvenate this shrub.
  • Propagate by softwood or hardwood cuttings

Requirements

Hardiness 5
– 9

Heat Zones 5
– 8

Climate Zones 2A, 2B, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17
Plant Type Shrubs
Plant Family Philadelphus – Mock Oranges
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)Summer (Early)
Height 4'
– 5'
(120cm
– 150cm)
Spread 5'
– 10'
(150cm
– 3m)
Spacing 120″ (300cm)
Water Needs Low, Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Fragrant, Showy
Tolerance Clay Soil, Drought
Garden Uses Beds and Borders, Hedges and Screens
Garden Styles City and Courtyard, Coastal Garden, Informal and Cottage