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Mayhaw, Riverflat Hawthorn

Crataegusopaca

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Crataegus opaca by reaver456
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Family
Rosaceae (ro-ZAY-see-ee)
Info
Genus
Crataegus (krah-TEE-gus)
Info
Species
opaca (oh-PAK-uh)
Info
Synonym
Sun Exposure
Sun to Partial Shade
Foliage
Grown for foliage
Deciduous
Height
10-12 ft. (3-3.6 m)
12-15 ft. (3.6-4.7 m)
Spacing
8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)
Hardiness
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)
Danger
Seed is poisonous if ingested
Bloom Color
White/Near White
Bloom Time
Late Spring/Early Summer
Mid Summer
Other Details
Category
Shrubs
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color

Unknown - Tell us

Where to Grow

Unknown - Tell us

Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size

Unknown - Tell us

Other details

Unknown - Tell us

Soil pH requirements
4.6 to 5.0 (highly acidic)
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information

Unknown - Tell us

Propagation Methods

Unknown - Tell us

Seed Collecting
Remove fleshy coating on seeds before storing
Allow unblemished fruit to ripen; clean and dry seeds
Properly cleaned, seed can be successfully stored
Regional

This plant is said to grow outdoors in the following regions:

Atmore, Alabama

Hughes, Arkansas

Hampton, Florida

Baton Rouge, Louisiana

Plain Dealing, Louisiana

Florence, Mississippi

Spring, Texas

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Gardener's Notes:

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Terry
Murfreesboro, TN (Zone 7a) | August 2003 | positive

In the southeast U.S., mayhaws are valued for their fruit, which is used to make jelly.

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