Pecan
Carya illinoinensisTree with edible nuts. Native to OK; Kanza and Pawnee are most scab-resistant; top commercial varieties
What to know before finding it a place.
Growing notes for our conditions.
Regional fit still depends on the actual site—especially drainage, exposure, irrigation, soil and the specific cultivar selected.
Oklahoma notes
Native to OK; Kanza and Pawnee are most scab-resistant; top commercial varieties
Disease resistance
Kanza, Pawnee: good disease resistance
Pruning
Minimal; remove crossing limbs; clean up leaf litter (scab control)
Care
Zinc deficiency common in OK; supplement annually; pecan scab is major issue
Drought tolerance
Moderate; consistent moisture improves performance
Plan the partners before planting the tree.
Pollination reference
For fruiting plants, compatible bloom timing and nearby partners can matter as much as the cultivar itself.
The cultivar can matter as much as the species.
These references help narrow the large number of named varieties to options better aligned with Zone 7A conditions, disease pressure and useful harvest windows.
Zone 7A Recommended Varieties
These are recommendations carried in the Organix Zone 7A reference database. They are not automatically the same as a cultivar personally proven by Organix on every site; site conditions and availability still matter.
Compare the varieties we have reference data for.
Open a cultivar to compare chill requirement, frost timing, harvest, heat and drought response, quality, strengths and cautions. A “Zone 7A Recommended” badge identifies cultivars also present in the recommendation list above.
Kanza★★★★★ Zone 7A Recommended Sep–Oct
OSU #1 recommended for Oklahoma; excellent scab resistance; adapted to entire state
Type II (protogynous) — must pair with Type I like Pawnee for best production
Pawnee★★★★★ Zone 7A Recommended Sep
Type I pollinator for Kanza; earliest-ripening commercial pecan; outstanding quality
Scab susceptible in wet years — apply fungicide in humid springs; thin for alternate bearing
Mayhaw★★★★★ Sep–Oct
Highly recommended for central and north OK; very good scab resistance
Small nut size limits commercial appeal but excellent flavor and reliability
Chickasaw★★★★★ Zone 7A Recommended Sep–Oct
Native ancestry; exceptional drought tolerance; excellent for food forests
Type I — pair with Kanza or Cheyenne for production
Desirable★★★★☆ Zone 7A Recommended Oct
Premium quality nut; very popular; good for high-end clients if managed
Scab HIGHLY susceptible — requires spray program in wet years; not for low-input
Wichita★★★★☆ Zone 7A Recommended Sep
Type II pollinator; widely available; good pairing with Pawnee or Cheyenne
Scab susceptible — not for low-spray programs; over-produces and needs thinning
How this plant can function in a larger system.
Landscape functions
Edible; Attractor; Mulcher
Edible parts
Nuts
Companion plants
Comfrey, Clover, Native grasses
Community / companion role
Pollination: Cross-pollinate (2 varieties: Type I + Type II); Compatible partners/pollinators: Pawnee (I) + Kanza (II); Desirable; Companions: Comfrey, Clover, Native grasses
Food-forest layer
Canopy
Oklahoma classification
Primary
Good establishment starts at planting.
The workbook’s installation guidance is surfaced here when a plant has a specific crew reference.
Support the plant without overcomplicating the system.
Soil preferences
Preferred pH 6.0-7.0
KNF / fertility schedule
Annual: spring FAA + compost tea; Summer: FPJ; Fall: IMO4
Maintenance
Minimal; remove crossing limbs; clean up leaf litter (scab control)
Plant performance varies with microclimate, soil, drainage, water, maintenance and cultivar. Organix uses the library to narrow good candidates, then makes final selections around the actual site.
Edible and medicinal tags describe traditional or practical plant uses in the landscape and are not medical advice. Always verify identification, preparation and individual suitability before consuming a plant.