Carnation in Zone 3a & 3b
Dianthus caryophyllus
When to plant carnation in zone 3b
Zones 3a and 3b share the same average frost dates in our data, so this page covers both.
Method: Start indoors: Start indoors from seed, then transplant outside. Carnation needs a head start most zones can't give it by direct-sowing alone.
| Start indoors | Apr 11–Apr 18 |
|---|---|
| Direct sow / transplant outside | May 23–May 30 |
| Estimated bloom | Oct 5–Oct 12 (~135 days after transplanting) |
Spacing: 4 per square foot (square-foot-gardening spacing). Mature height: 2-2.5 ft.
Carnation is the flower most people picture from a grocery-store bouquet, but the plant behind that image is a tender perennial, hardy in zones 6-8 and grown as an annual everywhere else. The seed-grown strain behind almost every home planting is Chabaud, a French heirloom bred for fragrance and cutting rather than the scentless, long-shelf-life carnations sold at florists today.
How carnation fits zone 3's season
Zone 3b's frost-free window runs about 98 days, from May 30 to September 5. Carnation needs about 135 days from transplant to first harvest.
Good companions
No standout companions recorded yet for Carnation.
Where to buy carnation seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing carnation" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 3b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Carnation in USDA zone 3b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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