Fennel (Florence/bulbing) in Zone 8a & 8b
Foeniculum vulgare var. azoricum
When to plant fennel (florence/bulbing) in zone 8b
Zones 8a and 8b share the same average frost dates in our data, so this page covers both.
Method: Either: Start indoors for an earlier harvest, or direct-sow outside for less fuss. Fennel (Florence/bulbing) tolerates either.
| Start indoors | Feb 18–Feb 25 |
|---|---|
| Direct sow / transplant outside | Apr 8–Apr 15 |
| Estimated harvest | Jul 7–Jul 14 (~90 days after planting) |
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 2-3 ft.

Florence fennel, the bulbing kind grown for its crisp, anise-flavored base, is a slow crop and a famously antisocial one. Almost every source on companion planting agrees on the same point: fennel doesn't play well with much of anything else in the garden.
How fennel (florence/bulbing) fits zone 8's season
Zone 8b's frost-free window runs about 230 days, from March 25 to November 10. Fennel (Florence/bulbing) needs about 90 days from sowing to first harvest.
Good companions
No standout companions recorded yet for Fennel (Florence/bulbing).
Where to buy fennel seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing fennel (florence/bulbing)" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 8b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →

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Growing Fennel (Florence/bulbing) in USDA zone 8b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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