GreenlyWhen to plant eggplants in San Jose: from 25 April
In San Jose, eggplant: sow for seedlings from 3 February; 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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Eggplant 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 eggplant 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 |
| Into an unheated greenhouse | from 4 April; April outside: 8.6 °C at night, 20.8 °C by day; card 21–29 °C |
| Days in the bed to the first harvest (card) | 70 |
| First harvest, if planted in this window | from 4 July |
| Daylight | 11:09 on 24 February, 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, Zucchini, Pumpkin and Watermelon.
Eggplant in San Jose: care after planting
Planted on 25 April: in the first weeks water every 4 days.
Feeding, by the card’s schedule from that day:
- 25 April — feed: balanced (NPK)
- 23 May — feed: nitrogen
Pests and diseases of eggplant to watch for:
- Bacterial wilt (brown rot of potato)
- Colorado Potato Beetle
- Early Blight
- Tomato hornworm
- Tomato russet mite
- Blossom-end rot
Dates count from the first planting day of the window above; a later planting moves them by as many days.
Weather in San Jose during the eggplant season
Days average above the eggplant card's 21–29 °C in July (30.2 °C) and August (30.1 °C). Months that stay below 21 °C even by day on average: April (20.8 °C). Nights average below 21 °C in every month of the season, from 8.6 °C to 15 °C.
| 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
Eggplant 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 – 13 August | 1 day earlier |
| Sacramento | 142 km | 24 April – 21 August | 1 day earlier |
| Fresno | 199 km | 10 April – 15 August | 15 days earlier |
| Carson City | 274 km | 13 May – 2 July | 18 days later |
| Reno | 303 km | 29 April – 8 July | 4 days later |
| Bakersfield | 338 km | 2 April – 24 August | 23 days earlier |
Where to buy eggplant 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 3 February. 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).
- De Anza College Farmers' Market — market
Stevens Creek Boulevard 21250, 95014 Cupertino · Sun 09:00–13:00 · 14 km · wcfma.org - World Ginseng & Health Products — market
Hostetter Road 1698, 95131 San Jose · Mon–Sat 10:00–18:00 · 5 km - Creekside Farmers' Market — market
Miller Avenue 10445, Cupertino · Fri 08:00–12:00 · 11 km - Japantown Certified Farmer’s Market — market
May–Oct Sun 08:00–12:00 · 2 km · japantownsanjose.org
Places: © OpenStreetMap contributors, ODbL.
- How to grow eggplant
- 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 eggplants in San Jose?
In San Jose, eggplant: sow for seedlings from 3 February; 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 eggplants for seedlings in San Jose?
Sow for seedlings from 3 February.
