When to plant broccoli in San Diego
Comfortable
Comfortable in greenhouse
Comfortable in a cold frame
Broccoli in San Diego is a good fit outdoors. The suitable growing window of 365 days covers the 55–75 days this plant usually needs.
- Start indoors
- August 13 – October 7
- Transplant outside
- October 1 – November 25
- Harvest
- November 25 – February 8
- Season vs crop
- 365 grow days vs 55–75 needed
Broccoli in San Diego is a good fit outdoors. The suitable growing window of 365 days covers the 55–75 days this plant usually needs.
Planting conditions
- Start indoors
- Harden off
- Transplant outside
- Grow outdoors
- Harvest
| Activity | Window | Notes |
|---|---|---|
| Start indoors | Aug 13 – Oct 7 | Sow indoors before the outdoor window. |
| Harden off | Sep 24 – Sep 30 | Acclimate seedlings outdoors before planting. |
| Transplant outside | October 1 | Move plants outside on this day (start of the plant-out window). |
| Grow outdoors | Oct 2 – Nov 24 | Plants grow outdoors until harvest. |
| Harvest | Nov 25 – Feb 8 | Expected harvest from typical days to harvest. |
Planting and growing across the year
Planting is the sow / plant-out window. Growing is daytime air versus this plant’s ideal (59 – 75 °F) and tolerable (39 – 81 °F) ranges.
Key dates
How these dates are judged
- Ideal conditions
- Daytime air from 59 – 75 °F.
- Suitable conditions
- Daytime air from 39 – 81 °F.
- Last frost and first frost
- Typical spring and fall frost dates for San Diego, shown in the key dates.
- Days to harvest
- 55–75 days from transplant, 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 Broccoli: All year (365 days)
Planting window for Broccoli: Oct 1 – Nov 25 (56 days)
Outdoors: weekly temperatures and windows
Temperatures across the year for San Diego. 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.
- 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 48 to 61 °F · Possible 42 to 69 °F
Growing: suitable
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 75 °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 San Diego
- Radish Planting dates
- Arugula Planting dates
- Spinach Planting dates
- Lettuce Planting dates
- Kale Planting dates
- Beet Planting dates
- Zucchini Planting dates
- Cucumber Planting dates
- Green bean Planting dates
- Tomato Planting dates
- Bell pepper Planting dates
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 32.72, -117.16, 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 Broccoli 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).