Mayhaw

Tree

Mayhaw

Crataegus opaca

Also known as: Riverflat hawthorn, May haw

TreeShrub Rosaceae EdibleWildlife AttractorOrnamental
Hardiness Zone
7-10
Ideal Temp
40–88°F
Survives Down To
-5°F
Life Cycle
Perennial

Mayhaw is the southern hawthorn that parties in wet woods and coughs up jelly so tart it makes grocery jam feel like lying. Thorns, white spring flowers, red fall fruit—classic permaculture “work for your sugar.” Native along swamp margins and low ground; plant where summer humidity and wet feet are features, not bugs. Sun and water: Full sun to part shade. Tolerates periodic inundation; fruiting improves with sun and steady soil moisture during spring growth. ✂️ Propagation: Seeds (double dormancy—slow); grafting selected cultivars onto seedling hawthorn roots for known jelly performance.

Good Neighbors
  • Elderberry
  • Buttonbush
  • Native iris
Cautions
  • Bone-dry berms
  • Fire blight-prone sites without cultivar selection (risk varies)
Known Threats — Organic Solutions Only
Aphids
Aphidoidea
Apple Maggot
Rhagoletis pomonella
Apple Scab
Venturia inaequalis
Bagworm
Thyridopteryx ephemeraeformis
Blackberry Psyllid
Cacopsylla curvata
Brown Marmorated Stink Bug
Halyomorpha halys
Brown Rot
Monilinia fructicola
Cherry Fruit Fly
Rhagoletis cingulata
Codling Moth
Cydia pomonella
Cyclamen Mite
Steneotarsonemus pallidus
Eastern Tent Caterpillar
Malacosoma americanum
Fall Webworm
Hyphantria cunea
Fire Blight
Erwinia amylovora
Gall Mite
Eriophyidae
Harlequin Ladybird
Harmonia axyridis
Leaf Blight
Various Fungal Pathogens
Leaf Spot
Multiple species (e.g., Cercospora, Septoria, Alternaria)
Lesser Peachtree Borer
Synanthedon pictipes
Oriental Fruit Fly
Bactrocera dorsalis
Oriental Fruit Moth
Grapholita molesta
Peach Twig Borer
Anarsia lineatella
Peachtree Borer
Synanthedon exitiosa
Pear Psylla
Cacopsylla pyricola
Plum Curculio
Conotrachelus nenuphar
Raspberry Beetle
Glischrochilus sanguinolentus
Raspberry Cane Borer
Oberea perspicillata
Rose Slug
Endelomyia aethiops
Rust Mite
Eriophyidae
Scale Insects
Coccoidea
Sparganothis Fruitworm
Sparganothis sulfureana
Spittlebugs
Cercopidae
Spotted Lanternfly
Lycorma delicatula
Stink Bug
Pentatomidae
Strawberry Root Weevil
Otiorhynchus ovatus
Tent Caterpillar
Malacosoma spp.
Twig Girdlers
Oncideres spp.
Vine Weevil
Otiorhynchus sulcatus