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When to plant lettuce in Los Angeles

How to grow LettuceLos Angeles climate
Where are you growing?

Comfortable

Not realistic in greenhouse

Comfortable in a cold frame

Lettuce in Los Angeles is a good fit outdoors. The suitable growing window of 228 days covers the 40–70 days this plant usually needs.

When to plantOctober 22 – June 6

Harvest
February 10 – June 6
Season vs crop
228 grow days vs 40–70 needed

Lettuce in Los Angeles is a good fit outdoors. The suitable growing window of 228 days covers the 40–70 days this plant usually needs.

Planting conditions

Lettuce planting activities across the year: Direct sow, HarvestJFMAMJJASOND
  • Direct sow
  • Harvest
Local activity windows for this place and growing method.
Suitable growing days in a row228
Days to harvest40–70 days from seed
Oct 22 – Jun 6
Direct sow
Feb 10 – Jun 6
Harvest
ActivityWindowNotes
Direct sowOct 22 – Jun 6Plant outdoors in this window.
HarvestFeb 10 – Jun 6Expected harvest from typical days to harvest.
Adjust a week or two for your conditions.

Planting and growing across the year

Planting is the sow / plant-out window. Growing is daytime air versus this plant’s ideal (59 – 70 °F) and tolerable (39 – 81 °F) ranges.

Lettuce planting and growing weeks in Los AngelesJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECPlantingGrowing
Planting uses sow / plant-out rules (frost, soil germination, night, and last-sow): green when plantable, blue diagonal when nights or soil are too cold, amber cross-hatch when too hot, faint for other calendar limits. Growing shows daytime air against this plant’s ideal and tolerable ranges across the year.

Key dates

Frost-free days365
Outdoor sow dateOctober 22
Direct sow windowOctober 22 – June 6
Suitable growing windowOctober 22 – June 6 (228 days)
Expected harvestFebruary 10 – June 6

How these dates are judged

Ideal conditions
Daytime air from 59 – 70 °F.
Suitable conditions
Daytime air from 39 – 81 °F.
Last frost and first frost
Typical spring and fall frost dates for Los Angeles, shown in the key dates.
Days to harvest
40–70 days from seed, from typical days to harvest.
Sowing window
Dated sow and harvest bars use frost dates, soil minima, night limits, and last-sow count-back from typical crop timing. The year strip and weekly chart use the same window: air ratings only colour weeks inside it.

Growing window for Lettuce: Jan 1 – Jun 6; Oct 22 – Jun 6 (385 days)

Planting window for Lettuce: Jan 1 – Jun 6; Oct 22 – Jun 6 (385 days)

Outdoors: weekly temperatures and windows

Temperatures across the year for Los Angeles. Shaded bands are this plant’s ideal and tolerable daytime air ranges. Growing is daytime air suitability; Planting is sow / plant-out conditions (same colour language). Window brackets mark each stretch.

JanFebMarAprMayJunJulAugSepOctNovDec−10 °C14 °F0 °C32 °F10 °C50 °F20 °C68 °F30 °C86 °F40 °C104 °F50 °C122 °FTolerable 4–27 °CTolerable 39–81 °FIdeal 15–21 °CIdeal 59–70 °FWindowGrowingJan 1 – Jun 6; Oct 22 – Jun 6PlantingJan 1 – Jun 6; Oct 22 – Jun 6No typical frost here. Timing follows heat, not frost.
  • Ideal range
  • Tolerable range
  • Possible min to max
  • Average min to max
  • Suitable
  • Tolerable
  • Too cold
  • Too hot

Selected week · tap a week or use the arrows

Week 1 · Jan 1 – Jan 4

Average 43 to 63 °F · Possible 35 to 79 °F

Growing: tolerable

Planting: suitable

A week is in range when its average low and high sit inside the tolerance band 39 to 81 °F; it is suitable when that average range also overlaps the ideal 59 to 70 °F band and possible readings stay within 39 °F to 81 °F. Crossing a possible limit, or missing the ideal band, makes it tolerable; a possible low below 39 °F makes it tolerable. When a sowing window is calculated, weeks outside that window are uncoloured even if air is in range.

Based on average frost dates.

Show all 53 weeks
Cover method weekly charts

Outdoor weekly chart is above. Open a cover chart only if you grow under fleece, a cold frame, or an unheated greenhouse.

Other plants for Los Angeles

Calculated by Plan & Plant · Method · Data 2019–2026

Frost and suitability dates are typical figures from climate statistics. Microclimates vary; they are not a guarantee.

How we calculated this
  • Data: ERA5-Land via Open-Meteo, cell 34.05, -118.25, years 2019–2026 (not a 30-year climate normal yet).
  • Typical and safer dates: Typical last frost is the date after which half of winters in this sample had no more frost; safer is later in the sample so fewer winters still frosted.
  • Crop rule: Local windows for Lettuce from frost dates, temperature ratings, and crop timing rules.
  • Confidence: Provisional — short or thin sample for this place.
  • Full methodology (algorithm 2026-10-season-6).

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