Xeranthemum (Immortelle) in Zone 5a & 5b
Xeranthemum annuum
When to plant xeranthemum (immortelle) in zone 5b
Zones 5a and 5b 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 | Mar 29–Apr 5 |
|---|---|
| Direct sow / transplant outside | May 10–May 17 |
| Estimated bloom | Aug 3–Aug 10 (~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 5's season
Zone 5b's frost-free window runs about 148 days, from May 10 to October 5. 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 5b 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 5b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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