California Poppy in Zone 4a & 4b
Eschscholzia californica
When to plant california poppy in zone 4b
Zones 4a and 4b share the same average frost dates in our data, so this page covers both.
Method: Direct sow: Direct-sow outside. California Poppy doesn't transplant well, or doesn't need the extra time indoors.
| Start indoors | Not typically started indoors |
|---|---|
| Direct sow / transplant outside | May 1–May 8 |
| Estimated bloom | Jul 20–Jul 27 (~80 days after direct-sowing) |
Spacing: 2 per square foot (square-foot-gardening spacing). Mature height: 0.5-1 ft.
California poppy is a direct-sow-only flower, and not because it's fussy. It's the opposite, thriving on neglect once it's in the ground. It stays under a foot tall, silky cup-shaped orange or yellow blooms over finely cut, blue-green ferny foliage. The catch is that the seed needs light to germinate, so anyone used to burying seed a half-inch deep will bury this one right out of viability.
How california poppy fits zone 4's season
Zone 4b's frost-free window runs about 128 days, from May 15 to September 20. California Poppy needs about 80 days from sowing to first harvest.
Good companions
No standout companions recorded yet for California Poppy.
Where to buy california poppy seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing california poppy" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 4b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing California Poppy in USDA zone 4b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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