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Herbaceous

Fennel

Foeniculum vulgare

Perennial with edible leaves, seeds, bulb, flowers. Easy and productive in OK; very drought tolerant; allow some self-seeding

Edible
At a Glance

What to know before finding it a place.

SunFull sun
WaterLow water
System layerHerbaceous
Plant typePerennial
Plant spacing18-24 in apart
Mature size4-6 ft / 2-3 ft
Chill hours0-500
Soil pH6.0-8.0
HarvestJun–Sep
Expected yieldContinuous
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

Easy and productive in OK; very drought tolerant; allow some self-seeding

Disease resistance

Excellent

Pruning

Cut back after seed set to prevent spreading; divide every 2-3 years

Care

All parts edible; host plant for swallowtail butterfly; keep away from most vegetables

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; self-seeding
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

Bronze FennelSweet FennelFlorence Fennel (bulb type)

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; Repeller

Edible parts

Leaves, Seeds, Bulb, Flowers

Companion plants

Dill, Borage — NOTE: Allelopathic to most vegetables

Community / companion role

Pollination: Self-fertile; self-seeding; Companions: Dill, Borage — NOTE: Allelopathic to most vegetables

Food-forest layer

Herbaceous

Oklahoma classification

Primary

Soil, Fertility & Care

Support the plant without overcomplicating the system.

Soil preferences

Preferred pH 6.0-8.0

KNF / fertility schedule

Minimal

Maintenance

Cut back after seed set to prevent spreading; divide every 2-3 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.