When to plant tomatoes in Stockton: 1 April – 13 August

In Stockton, tomato: sow for seedlings from 18 January to 22 June; plant into a greenhouse from 11 March to 13 August; plant out into open ground from 1 April to 13 August. For plants and seeds, the places nearby include Pacific Ave Indoor (garden centre, 4 km) and The Fruit Bowl (farm shop, 10 km); addresses and opening hours are below.

Tomato in Stockton: soil, season and weather

In Stockton the soil, not frost, sets the date: the last frost is over around 4 February, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 1 April, 56 days later.

Last spring frost	4 February
Top 7 cm of soil at 15 °C	1 April, 56 days after the last frost
Into an unheated greenhouse	11 March – 13 August; March outside: 6.9 °C at night, 18.5 °C by day; card 16–27 °C
First autumn frost	3 December, 246 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	10 June – 22 October
Days left for picking	176
Daylight	10:32 on 8 February, 12:36 on 1 April
Watering outdoors when fruiting (card)	every 3 days; the driest month, July, has 0 rainy days

Tomato in Stockton: care after planting

Planted on 1 April: in the first weeks water every 4 days.

Feeding, by the card’s schedule from that day:

1 April — feed: balanced (NPK)
29 April — feed: nitrogen

Pests and diseases of tomato to watch for:

Dates count from the first planting day of the window above; a later planting moves them by as many days.

Weather in Stockton during the tomato season

Days average above the tomato card's 16–27 °C in May–September (28.1–36 °C). Months that stay below 16 °C even by day on average: December (13.5 °C). Nights average below 16 °C in April–June and September–December (4.8–15.4 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
April	23.3	9.2	37	5	13:10
May	28.1	12.1	18	3	14:12
June	33.4	15.1	1	0	14:47
July	36	16.4	0	0	14:33
August	35.5	16.7	1	0	13:40
September	32.7	15.4	7	1	12:28
October	26.8	11.6	38	3	11:16
November	18.3	6.9	58	6	10:09
December	13.5	4.8	122	10	9:33

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Stockton, Fresno is 17 days earlier and Carson City 37 days later.

City	Distance	Date	Difference
Sacramento	71 km	31 March – 21 August	1 day earlier
San Jose	87 km	from 6 April	5 days later
Carson City	188 km	8 May – 2 July	37 days later
Fresno	190 km	15 March – 15 August	17 days earlier
Reno	217 km	23 April – 8 July	22 days later
Redding	307 km	14 April – 21 August	13 days later

Where to buy tomato plants and seeds near Stockton

Buy plants ready to set out from 1 April to 13 August (from 11 March to 13 August for an unheated greenhouse); seed for raising your own is sown from 18 January to 22 June. Within 15 km of Stockton OpenStreetMap lists 2 garden centres and 1 farm shop (collected 28 October 2026).

Pacific Ave Indoor — garden centre
Pacific Avenue 4633, Stockton · 4 km
Lowes Garden Center — garden centre
Trinity Parkway 10342, Stockton · 12 km
The Fruit Bowl — farm shop
E Waterloo Road 8767, 95215 Stockton · 10 km

Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

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