Washington hawthorn is a small rounded deciduous tree from the eastern United States. The three- to five-lobed, maple-like leaves change from purple when new to glossy dark green in summer to orange or red in fall. Flat clusters of scented white flowers appear in late spring or early summer, followed in fall by bright red berries that hold through much of winter, attracting songbirds. The spreading, horizontal limbs brandish long thorns. The snow-frosted thorns and berries are a highlight of the winter landscape.
This graceful, multi-seasonal tree prospers in full sun and most neutral to slightly acidic soils. Unlike most hawthorns, it tolerates hot humid summers. Use it as a specimen or massed in the lawn, along streets, or for hedging and screening.
Information source: www.Learn2Grow.com.
Genus - Crataegus
Species - Phaenopyrum
Common name - Washington Hawthorn
Pre-Treatment - Required
Plant type - Medium Tree
Vegetation type - Deciduous
Hardiness zones - 4 - 8
Exposure - Full Sun
Height - 20'-30' / 6 - 9 m
Spread - 20'-25' / 6 - 8 m
Growth rate - Medium
Bloom season - Late Spring, Early Summer
Leaf / Flower color - Green, Dark Green / White
Soil PH - Acidic, Neutral
Soil type - Clay, laom, Sand, well drained
Water requirements - Average Water
Landscape uses - Feature Plant, Hedges, Screening / Wind Break, Shade Trees, Street Trees
1. Wrap the hawthorn seeds in a moistened paper towel. Place the paper towel inside a sealable plastic bag. Store the seeds this way for 90 days inside a refrigerator to cold-stratify them.
2. Fill a 3-4 l (1-gallon) plastic pot with a mixture of equal measures potting soil and compost. Sow two hawthorn seeds in the pot to a depth of 5-8 mm (1/4"). Water the pot to a depth of 3 cm (1").
3. Place the pot outdoors, either against a south-facing wall or in a cold frame, where they will be exposed to normal outdoor temperature fluctuations and precipitation.
4. Water the hawthorn seeds only during extended periods of dry weather to keep the soil moist, at a depth of 3 cm (1"). Avoid overwatering the hawthorn seeds since they might rot.
5. Check the pot periodically to ensure no birds or rodents have taken the hawthorn seeds. Place mesh over the top of the pot if it appears that creatures are foraging for the seeds.
6. Watch for signs of germination starting 18 months after sowing. Thin the hawthorn seedlings once they reach 5-6 cm (2") in height. Remove the less vigorous of the two seedlings.
7. Keep the hawthorn seedling in the pot with evenly moist soil until it reaches 30 cm (12") in height, then plant it in a permanent bed with partial sun. (source: eHow.com)