State × crop calendar
Cereal Oats planting in California.
- Secondary crop
- Zone 9a
- 270-day season
- Last frost March 1
- Cover Crop
- Frost Hardy
Cereal Oats planting in California is shaped by the state's 9a dominant hardiness zone, last frost date around March 1, and a 270-day growing season. Cereal Oats is grown in California but is not a dominant crop — works for home gardens, food plots, and some commercial production.
Planting dates on this page are climatological estimates from USDA frost-date norms and zone-typical planting offsets. Verify against University of California Cooperative Extension for variety- and county-specific guidance.
Planting calendar — 2026
Frost-anchored windows.
Cereal Oats · California · planting calendar
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
Planting windows
Earliest → ideal → latest.
Spring planting
Cereal OatsEarliest
February 9
Ideal start
February 23
Ideal end
March 22
Latest
April 12
Soil-temp trigger
Spring oats: plant as soon as soil can be worked. Fall oats: 60-75 days before first hard freeze — winter-killed in northern states.Fall planting
Cereal OatsEarliest
September 16
Ideal start
October 1
Ideal end
October 16
Latest
November 2
Soil-temp trigger
Spring oats: plant as soon as soil can be worked. Fall oats: 60-75 days before first hard freeze — winter-killed in northern states.Harvest window
Typical start
May 23
Typical end
June 22
Harvest timing varies with planting date and seasonal weather — these dates are typical for the ideal planting window.
Growing notes
Cereal Oats can be successfully grown in California with attention to variety selection. The state's 270-day growing season requires choosing varieties appropriate for the growing window.
Cereal Oats is grown in California but is not a dominant crop — works for home gardens, food plots, and some commercial production.
Agronomy reference
Cereal Oats fundamentals.
Soil-temp minimum
38°F
Soil-temp optimum
45–75°F
Days to maturity
90–120
Water (in/wk)
0.5–1"
Soil pH
5.5–7
Nitrogen demand
moderate
Spring oats are an early-season grain; fall-planted oats winter-kill in most of the Midwest and Northeast (a feature for cover crop use).
Common pests to watch
- Aphids
- Cereal leaf beetle
Pest pressure varies by region and year. Confirm current outbreaks with University of California Cooperative Extension.
Common diseases
- Crown rust
- BYDV
- Smut
Resistance varieties shift each year. Check the current variety trial report for your state.
Variety selection
Cereal Oats varieties for California live with your extension.
Variety selection
Variety performance is micro-regional and changes with each year's trial cycle. We don't republish variety lists — instead, we point directly at the source.
University of California Cooperative Extension →Search the extension site for “cereal oats variety trial” or “recommended cereal oats varieties” to find the current report.
Yield varies significantly by variety, soil, fertility, and management. Consult your state extension service for variety performance trials in your region.
Cereal Oats timing. Live alerts.
Bield: Farm ties weather and soil-temperature stations in your county to crop planting thresholds — get notified the day soil temp clears your target window.
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