Georgetown, CA 95634 planting calendar
- USDA zone
- 9a20 to 25 °F
- Last frost
- Apr 12avg, 32°F
- First frost
- Nov 21avg, 32°F
- Growing season
- 221days
Georgetown, California is in USDA plant hardiness zone 9a. Its average last spring frost is around April 12 and the first fall frost around November 21, giving a growing season of about 221 days (NOAA 1991–2020 normals, 32°F, median). Start tender crops like tomatoes and peppers indoors weeks before the last frost and set them out afterward; sow hardy crops such as peas, spinach, and lettuce before it. The planner below turns those frost dates into a printable per-crop planting calendar.
Georgetown planting calendar
Each crop's windows are counted from Georgetown's average frost dates. hatched = start seeds indoors, solid green = plant out, teal = a fall sowing, and the terracotta dot marks the estimated first harvest. Ranges are extension-guide planning guidance, not guarantees.
- Start indoors
- Plant out
- Fall sowing
- First harvest
| Crop | Frost tolerance | Start indoors | Plant out | First harvest | Fall planting |
|---|---|---|---|---|---|
| Tomato | Tender | Feb 15 – Mar 1 | Apr 19 – Apr 26 | Jun 18 – Jul 8 | — |
| Pepper | Very tender | Feb 1 – Feb 15 | Apr 26 – May 3 | Jun 25 – Jul 25 | — |
| Cucumber | Tender | Mar 15 – Mar 22 | Apr 19 – Apr 26 | Jun 8 – Jun 28 | — |
| Summer squash / zucchini | Tender | — | Apr 19 – Apr 26 | Jun 3 – Jun 18 | — |
| Bush bean | Tender | — | Apr 19 – Apr 26 | Jun 8 – Jun 18 | Sep 22 – Oct 2 |
| Sweet corn | Tender | — | Apr 12 – Apr 26 | Jun 11 – Jul 11 | — |
| Basil | Very tender | Mar 1 – Mar 15 | Apr 19 – Apr 26 | May 19 – Jun 3 | — |
| Lettuce | Half-hardy | Mar 1 – Mar 15 | Mar 15 – Mar 29 | Apr 29 – May 14 | Sep 8 – Sep 23 |
| Pea | Hardy | — | Mar 1 – Mar 15 | Apr 25 – May 10 | Aug 29 – Sep 13 |
| Spinach | Hardy | — | Mar 1 – Mar 15 | Apr 10 – Apr 20 | Sep 18 – Sep 28 |
| Carrot | Half-hardy | — | Mar 22 – Mar 29 | May 21 – Jun 10 | Aug 19 – Sep 8 |
| Broccoli | Half-hardy | Feb 15 – Mar 1 | Mar 15 – Mar 29 | May 9 – May 29 | Aug 24 – Sep 13 |
Data: NOAA NCEI U.S. Climate Normals 1991–2020 (public domain) and USDA Plant Hardiness Zone Map 2023. Planting windows synthesized from U.S. Cooperative Extension guides.
Frost & freeze dates
From NOAA's 1991–2020 Climate Normals at station USC00043384. The median (p50) is the average date; the 90%-safe column is the date the freeze has passed in about 9 years out of 10 (p10 for spring, p90 for fall) — the conservative date to plant after or harvest before.
| Threshold | Last spring — avg | Last spring — 90%-safe | First fall — avg | First fall — 90%-safe | Season (days) |
|---|---|---|---|---|---|
| 36°F | May 1 | May 27 | Nov 3 | Nov 22 | 183 |
| 32°F (freeze) | Apr 12 | May 10 | Nov 21 | Dec 9 | 221 |
| 28°F | Mar 13 | Apr 14 | Dec 8 | Jan 6 | 269 |
| 24°F | Feb 8 | Mar 19 | Jan 1 | Feb 18 | 326 |
32°F is the standard "freeze" line that damages tender crops; lighter 36°F frost can nip the most cold-sensitive plants, while hardy crops shrug off light frost down toward 28°F. Use the threshold that matches what you are protecting.
Growing degree days
Growing degree days (GDD) accumulate warmth above a base temperature over the year — a better predictor of crop development than the calendar alone. Warm-season crops need a long, warm GDD total; a short, cool GDD total favors greens and brassicas.
| Model | °F·days | Used for |
|---|---|---|
| Base 50°F (warm-season) | 3,939 | standard warm-season base (tomato, corn, beans) |
| Base 40°F (cool-season) | 6,806 | cool-season crops (brassicas, greens) |
Hardiness zone 9a
Georgetown sits in USDA plant hardiness zone 9a on the 2023 map — meaning its average annual extreme minimum winter temperature is about 20 to 25 °F. That number tells you which perennials, shrubs, and trees reliably survive an average winter here; it does not set your planting dates, which come from the frost calendar above.
Explore more places in zone 9a, or see all USDA hardiness zones.
Frequently asked questions
- What USDA hardiness zone is Georgetown?
- Georgetown, California is in USDA plant hardiness zone 9a on the 2023 map (average annual extreme minimum temperature 20 to 25 °F) — from the USDA Plant Hardiness Zone Map 2023, matched to this location's ZIP. See the methodology page for sources.
- When is the last frost in Georgetown?
- The average (median) last spring frost at 32°F is around April 12, from NOAA's 1991–2020 climate normals at the nearest reporting station. Roughly one year in ten the last frost is as late as May 10, so wait until then before setting out frost-tender plants if you want to be safe.
- When is the first fall frost in Georgetown?
- The average first fall frost at 32°F is around November 21. That leaves a growing season of about 221 days between the average last spring and first fall frosts.
- When should I start tomatoes in Georgetown?
- Start tomato seeds indoors about Feb 15 – Mar 1 and transplant them outside about Apr 19 – Apr 26, once the danger of frost has passed. Estimated first harvest is around Jun 18 – Jul 8.
- How long is the growing season in Georgetown?
- About 221 days at the 32°F threshold (NOAA 1991–2020, median) — the span between the average last spring frost (~April 12) and the average first fall frost (~November 21). Cold-hardy crops extend usable time at both ends; frost-tender crops fit inside it.
Sources & method
Frost, freeze, growing-season, and growing-degree-day figures are NOAA NCEI U.S. Climate Normals 1991–2020 for station USC00043384 (Georgetown Rs, 8.9 km away). The hardiness zone is the USDA Plant Hardiness Zone Map 2023, matched to this location's ZIP. Planting windows are computed by counting from the average last and first frost using per-crop offsets synthesized from U.S. Cooperative Extension guides — the full method and citations are on the methodology page.