How to Grow California Poppy
Eschscholzia californica
Your complete guide to growing California Poppy.
📷 Wikimedia CommonsWhen to Plant California Poppy
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | May – June | July – September | — |
| Zone 2 | April – May | June – August | — |
| Zone 3 | April – May | June – August | — |
| Zone 4 | March – April | June – July | — |
| Zone 5 | March – April | May – July | — |
| Zone 6 | March – April | May – July | — |
| Zone 7 | February – March | April – June | — |
| Zone 8 | February – March | April – June | — |
| Zone 9 | January – February | March – May | — |
| Zone 10 | January | February – April | — |
| Zone 11 | January | January – March | — |
| Zone 12 | January | January – March | — |
| Zone 13 | January | January – March | — |
Companion Plants for California Poppy
✓ Good companions
Fellow California native that blooms simultaneously and supports local ecosystem
Extends blooming season and attracts pollinators without competing for resources
Similar growing requirements and attracts beneficial insects for natural pest control
Attracts beneficial pollinators and repels pests while tolerating similar dry conditions
Attracts beneficial pollinators and repels pests with similar water and soil requirements
Fixes nitrogen in soil and creates attractive native wildflower combinations
Natural pest deterrent that thrives in similar sunny, dry conditions
Acts as trap crop for aphids and adds complementary orange colors
Native companion that attracts hummingbirds and butterflies while sharing water needs
Deters pests naturally and shares preference for well-draining, dry soil
Thrives in similar dry, well-draining conditions and deters harmful insects
Repels harmful insects and thrives in similar Mediterranean climate conditions
Shares drought tolerance and Mediterranean growing conditions, repels garden pests
Provides beneficial shade and windbreak while attracting pollinators
Improves soil health and attracts beneficial insects like ladybugs and lacewings
Attracts beneficial insects and tolerates similar drought conditions
✗ Keep away from
Produces juglone toxin that inhibits growth and can kill California poppies
Requires heavy watering and rich soil that can cause California poppies to become leggy
Allelopathic properties inhibit growth of most nearby plants including poppies
Aggressive spreader that competes for nutrients and space, prefers different moisture levels
Tall growth creates shade that reduces poppy flowering and vigor
Need frequent watering and fertilization which promotes excessive foliage in poppies
