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iNaturalist
Washington Hawthorn Plant Care
Crataegus phaenopyrum (L.f.) Borkh.
Crataegus phaenopyrum, also known as Washington hawthorn, is a striking ornamental tree known for its glossy green leaves that turn vibrant shades of red and orange in the fall. Its dense, compact growth habit makes it a popular choice for urban landscapes.nativeTo: Eastern United States
Every 7–14 days
Full sun to partial shade
0–100°F
40–70%
What Is the Washington Hawthorn?
Washington Hawthorn (Crataegus phaenopyrum) belongs to the Rosaceae family within the Crataegus genus. Washington Hawthorn is native to Eastern United States. Washington Hawthorn is also known as Washington Thorn.
Washington Hawthorn displays a small to medium-sized deciduous tree growth habit, reaching up to 30 inches tall with a spread of approximately 25 inches. Washington Hawthorn produces clusters of white or pink blossoms.
Leaf size: approximately 3 inches.
How Often Should You Water a Washington Hawthorn?
Crataegus phaenopyrum requires watering every 7–14 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–14 days
Let soil partially dry between waterings
What Light Does the Washington Hawthorn Need?
Washington Hawthorn thrives in full sun to partial shade light conditions. The optimal light range is 200–1000 lux. Avoid placing Washington Hawthorn in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Full sun to partial shade
200–1000 lux
What Temperature and Humidity Does the Washington Hawthorn Prefer?
Crataegus phaenopyrum grows best at temperatures between 0°F and 100°F. Washington Hawthorn prefers humidity levels of 40–70%.
Temperature
0–100°F
Humidity
40–70%
What Soil Mix Works Best for a Washington Hawthorn?
Well-draining loamy soil with added compost for nutrients. Good drainage is essential for Washington Hawthorn to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Washington Hawthorn?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Washington Hawthorn?
Washington Hawthorn can be propagated through seeds, hardwood cuttings. Similar propagation techniques also apply to cockspur hawthorn plant care, which shares the same genus.
Fertilizing
Every 6 months
During the growing season
Is the Washington Hawthorn Toxic to Pets and Children?
Non-Toxic
Non-toxic to humans and pets
What Pests and Diseases Affect the Washington Hawthorn?
Washington Hawthorn is susceptible to aphids, caterpillars, scale insects. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
What USDA Hardiness Zone Does the Washington Hawthorn Need?
Washington Hawthorn grows outdoors in USDA Zone 4 – 8. Native to Eastern United States, Washington Hawthorn is adapted to warm climates. In cooler regions, grow Washington Hawthorn as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 4 – 8
Keep exploring plants
Washington Hawthorn is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Crataegus genus — compare its care with other Crataegus species on PlantoScan.
Washington Hawthorn tolerates low-light rooms and shaded spots — browse the full list of low-light plants.
More Crataegus Species
Other Crataegus species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
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