Seed-start answer
Start tomatoes seeds indoors around Dec 9
In ZIP 92805, start tomatoes seeds indoors around Dec 9, about 42 days before the Jan 20 last-frost estimate.
Source: anaheim-fullerton frost station, USDA zone 10b, last updated 2026-06-28. Verify locally before planting high-value crops because microclimates, current weather, and yard exposure can move the safe date.
This uses ZIP 92805, the Anaheim frost station, and the Jan 20 last-frost estimate.
Seed starting schedule
Tomatoes dates for Anaheim, CA
| Step | Date | How to use it |
|---|---|---|
| Start Indoors | December 9, 2025 | Start seeds under lights or in a bright indoor seed-starting space. |
| Transplant Outdoors | January 27, 2026 | Move hardened-off seedlings outside after the frost-risk window. |