When to plant tomatoes in Hanover: 15 May – 1 August

In Hanover, tomato: sow for seedlings from 3 March to 10 June; plant into a greenhouse from 24 April to 1 August; plant out into open ground from 15 May to 1 August. For plants and seeds, the places nearby include Gärtnerei Markgraf (garden centre, 5 km) and STANZE Gartencenter (garden centre, 6 km); addresses and opening hours are below.

Tomato in Hanover: soil, season and weather

In Hanover the soil, not frost, sets the date: the last frost is over around 9 April, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 15 May, 36 days later.

Last spring frost	9 April
Top 7 cm of soil at 15 °C	15 May, 36 days after the last frost
Into an unheated greenhouse	24 April – 1 August; April outside: 4.3 °C at night, 14.1 °C by day; card 16–27 °C
First autumn frost	21 November, 190 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	24 July – 10 October
Days left for picking	120
Daylight	12:25 on 24 March, 15:42 on 15 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, May, has 9 rainy days

Tomato in Hanover: care after planting

Planted on 15 May: in the first weeks water every 4 days.

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

15 May — feed: balanced (NPK)
12 June — 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 Hanover during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, August, averages 24.1 °C. Months that stay below 16 °C even by day on average: October (15.1 °C) and November (8.9 °C). Nights average below 16 °C in every month of the season, from 3.7 °C to 14.4 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	18.6	8.6	45	9	15:42
June	23.1	13.1	67	11	16:46
July	23.5	14.2	69	12	16:21
August	24.1	14.4	54	11	14:45
September	20.4	11.4	48	9	12:44
October	15.1	8.5	65	13	10:43
November	8.9	3.7	55	13	8:48

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Hanover, Münster is 4 days earlier and Bremen 2 days later.

City	Distance	Date	Difference
Bielefeld	91 km	13 May – 29 July	2 days earlier
Bremen	101 km	17 May – 30 July	2 days later
Magdeburg	132 km	14 May – 29 July	1 day earlier
Hamburg	132 km	14 May – 30 July	1 day earlier
Münster	150 km	11 May – 1 August	4 days earlier
Erfurt	179 km	15 May – 18 July	same day

Where to buy tomato plants and seeds near Hanover

Buy plants ready to set out from 15 May to 1 August (from 24 April to 1 August for an unheated greenhouse); seed for raising your own is sown from 3 March to 10 June. Within 15 km of Hanover OpenStreetMap lists 20 garden centres, 3 farm-supply shops, 7 plant nurseries, 20 markets and 30 farm shops (collected 28 October 2026).

Gärtnerei Markgraf — garden centre
Am Fuhrenkampe 6, 30419 Hannover · Mon–Fri 08:00–18:00; Sat 08:00–16:00 · 5 km · gaertnerei-markgraf.de
STANZE Gartencenter — garden centre
Karoline-Herschel-Straße 1, 30966 Hemmingen · Mon–Sat 09:00–19:30; Sun 13:00–16:00 · 6 km · stanze-gartencenter.de
Glende Pflanzenparadies — garden centre
Göttinger Landstraße 81, 30966 Hemmingen · Mon–Sat 09:00–18:00; Sun 11:00–14:00 · 6 km · glende-pflanzenparadies.de
Villmann — garden centre
Langenhagener Straße 84, 30855 Langenhagen · Mon–Fri 09:00–18:00; Sat 09:00–14:00 · 9 km · villmann-baumschulen.de

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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