GreenlyWhen to plant zucchini in San Jose: from 25 April
In San Jose, zucchini: sow for seedlings from 14 March; plant into a greenhouse from 4 April; plant out into open ground from 25 April. There is no autumn frost here, so the frost dates set no end to the window.
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Zucchini in San Jose: soil, season and weather
In San Jose the soil, not frost, sets the date: the last frost is over around 24 February, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 25 April, 60 days later. San Jose has no autumn frost in the median year, so frost does not end the season.
| Last spring frost | 24 February |
|---|---|
| Top 7 cm of soil at 18 °C | 25 April, 60 days after the last frost |
| Days in the bed to the first harvest (card) | 36 |
| First harvest, if planted in this window | from 31 May |
| Daylight | 12:43 on 4 April, 13:30 on 25 April |
| Watering outdoors when fruiting (card) | every 3 days; the driest month, June, has 0 rainy days |
The same dates in San Jose hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.
Zucchini in San Jose: care after planting
Planted on 25 April: in the first weeks water every 4 days.
Pests and diseases of zucchini to watch for:
Weather in San Jose during the zucchini season
About 49 mm of rain falls in the season; June is the driest month (0 mm) and April the wettest (27 mm).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days | Daylight on the 15th |
|---|---|---|---|---|---|
| April | 20.8 | 8.6 | 27 | 4 | 13:08 |
| May | 24.4 | 10.8 | 16 | 3 | 14:10 |
| June | 28.7 | 13.3 | 0 | 0 | 14:43 |
| July | 30.2 | 14.5 | 0 | 0 | 14:30 |
| August | 30.1 | 15 | 1 | 0 | 13:38 |
| September | 28.7 | 14.5 | 5 | 1 | 12:28 |
ERA5 2016–2025, Open-Meteo
Zucchini in nearby cities
Around San Jose, Bakersfield is 23 days earlier and Carson City 18 days later.
| City | Distance | Date | Difference |
|---|---|---|---|
| Stockton | 87 km | 24 April – 16 September | 1 day earlier |
| Sacramento | 142 km | 24 April – 24 September | 1 day earlier |
| Fresno | 199 km | 10 April – 18 September | 15 days earlier |
| Carson City | 274 km | 13 May – 5 August | 18 days later |
| Reno | 303 km | 29 April – 11 August | 4 days later |
| Bakersfield | 338 km | 2 April – 27 September | 23 days earlier |
Where to buy zucchini plants and seeds near San Jose
Buy plants ready to set out from 25 April (from 4 April for an unheated greenhouse); seed for raising your own is sown from 14 March. Within 15 km of San Jose OpenStreetMap lists 11 garden centres, 1 farm-supply shop, 1 plant nursery, 16 markets and 1 farm shop (collected 20 October 2026).
- Tana Ethio Market — market
South Winchester Boulevard 1358, 95128 San Jose · 7 km - Mi Rancho Market — market
Auzerais Avenue 494, 95126 San Jose · 2 km - Don Mateo Foods — market
East Santa Clara Street 1062, 95116 San Jose · 2 km - Milpitas Farmer's Market — market
Sun 08:00–13:00 · 8 km
Places: © OpenStreetMap contributors, ODbL.
- How to grow zucchini
- All frost dates and weather of San Jose
- Shops and markets: San Jose
- Selling a surplus in the United States
- Moon planting calendar for November 2026
- How we calculate the dates
Questions
When to plant zucchini in San Jose?
In San Jose, zucchini: sow for seedlings from 14 March; plant into a greenhouse from 4 April; plant out into open ground from 25 April. There is no autumn frost here, so the frost dates set no end to the window.
When to sow zucchini for seedlings in San Jose?
Sow for seedlings from 14 March.
