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Herbaceous

Sunflower (Perennial)

Helianthus angustifolius / maximiliani

Perennial with edible seeds. Native to Oklahoma prairies; requires no care once established; incredible pollinator value

NativeEdiblePollinator
At a Glance

What to know before finding it a place.

SunFull sun
WaterLow water
System layerHerbaceous
Plant typePerennial
Plant spacing24-36 in apart
Mature size4-8 ft / spreading
Chill hours0-500
Soil pH5.5-7.5
HarvestSep–Oct (seeds)
Expected yieldSeeds for eating/oil
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 Oklahoma prairies; requires no care once established; incredible pollinator value

Disease resistance

Excellent; native resilience

Pruning

Cut to ground in fall; divide every 3-5 years

Care

Seeds edible; Maximilian Sunflower is the best native for OK food forests

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.

PollinationCross-pollinate (wind/bees)
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

Maximilian Sunflower (H. maximiliani)Swamp Sunflower (H. angustifolius)

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; Attractor; Accumulator

Edible parts

Seeds

Companion plants

Native wildflowers, Echinacea, Yarrow

Community / companion role

Pollination: Cross-pollinate (wind/bees); Companions: Native wildflowers, Echinacea, Yarrow

Food-forest layer

Herbaceous

Oklahoma classification

Primary

Soil, Fertility & Care

Support the plant without overcomplicating the system.

Soil preferences

Preferred pH 5.5-7.5

KNF / fertility schedule

Minimal

Maintenance

Cut to ground in fall; divide every 3-5 years

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.