Xeranthemum (Immortelle) in Zone 10a & 10b
Xeranthemum annuum
When to plant xeranthemum (immortelle) in zone 10b
Zones 10a and 10b 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. Xeranthemum (Immortelle) tolerates either.
| Start indoors | Dec 19–Dec 26 |
|---|---|
| Direct sow / transplant outside | Jan 30–Feb 6 |
| Estimated bloom | Apr 25–May 2 (~85 days after planting) |
Spacing: 4 per square foot (square-foot-gardening spacing). Mature height: 1.5-2 ft.
Xeranthemum, also called immortelle or paper flower, is a papery-petaled daisy relative that holds its color remarkably well once dried, which is the entire reason it's grown.
How xeranthemum (immortelle) fits zone 10's season
Zone 10b's frost-free window runs about 324 days, from January 30 to December 20. Xeranthemum (Immortelle) needs about 85 days from sowing to first harvest.
Good companions
No standout companions recorded yet for Xeranthemum (Immortelle).
Where to buy xeranthemum seeds
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See it growing
Search YouTube for "growing xeranthemum (immortelle)" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 10b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Xeranthemum (Immortelle) in USDA zone 10b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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