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Overstory

Black Locust

Robinia pseudoacacia

Tree with edible flowers (edible), wood. Native to eastern OK/Ozarks; excellent coppice tree for biomass and N-fixation; manage spread

NativeEdible
At a Glance

What to know before finding it a place.

SunFull sun
WaterLow water
System layerOverstory
Plant typeTree
Plant spacing10-15 ft apart
Mature size40-80 ft / 20-30 ft
Chill hours400-800
Soil pH5.5-8.0
HarvestMay–Jun (flowers/seeds)
Expected yieldFlowers for cooking; seeds (limited)
TrellisNo
Central Oklahoma

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 eastern OK/Ozarks; excellent coppice tree for biomass and N-fixation; manage spread

Disease resistance

Excellent

Pruning

Coppice for biomass; thin for timber; manage suckering

Care

Flowers edible in spring; prolific nitrogen fixer; extremely hard wood; invasive in some sites

Drought tolerance

High once established

Pollination & Production

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.

PollinationSelf-fertile
Compatible partners–
Variety Selection

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

Black Locust (species)Twisty Baby (ornamental)

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.

Landscape Role

How this plant can function in a larger system.

Landscape functions

Edible (flowers); Attractor; Nitrogen Fixer; Mulcher; Suppressor

Edible parts

Flowers (edible), Wood

Companion plants

Fruit trees, Comfrey

Community / companion role

Pollination: Self-fertile; Companions: Fruit trees, Comfrey

Food-forest layer

Canopy

Oklahoma classification

Secondary

Soil, Fertility & Care

Support the plant without overcomplicating the system.

Soil preferences

Preferred pH 5.5-8.0

KNF / fertility schedule

Minimal; coppice every 3-5 years for maximum biomass

Maintenance

Coppice for biomass; thin for timber; manage suckering

Use this as a planning reference.

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.