Washington Hawthorn (Crataegus phaenopyrum)

Washington Hawthorn

Crataegus phaenopyrum

Its clusters of white blooms and red berries paint seasonal charm. Deciduous ornamental tree; common name: Washington hawthorn.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; full sun promotes best flowering and fruiting; tolerates urban pollution
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Watering Water deeply when the top 5–7 cm of soil is dry; drought-tolerant once fully established
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Temperature Extremely cold-hardy, tolerating temperatures as low as -30°C; withstands hot summer conditions in temperate regions
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Characteristics

  • Leaf: Lobed, glossy green leaves that turn vibrant red-purple in autumn
  • Flower: Dense clusters of small, fragrant white five-petaled blooms
  • Fruit: Bright red pomes (berries) that persist through winter
  • Stem/Bark: Thorny branches with gray-brown, fissured bark as it matures
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Care Guide

Watering

Water regularly during the first 2–3 years of establishment; reduce frequency once mature

Fertilization

Apply a balanced slow-release fertilizer once in early spring. Avoid over-fertilizing to prevent excessive foliage growth at the expense of blooms and fruit

Eggshell powder topdress:Crush dried eggshells into a fine powder; sprinkle 1–2 tbsp around the tree's base in early spring, mixing lightly into the topsoil
Pruning
  • Remove dead, diseased, or crossing branches in late winter before new growth emerges
  • Thin dense inner branches to improve air circulation and light penetration
  • Shape the canopy lightly immediately after flowering to maintain a rounded form
  • Remove basal suckers regularly to prevent overcrowding and maintain tree structure
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no known adverse effects from ingestion

Humans: Non-toxic to humans; berries are edible when fully ripe (avoid unripe fruit)

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Garden Uses & Culture

Culture: Symbolizes protection and resilience in some North American horticultural traditions

Usage: Ornamental landscape tree; berries provide winter food for native birds; thorny branches can be used as a natural hedge barrier