When to plant cucumbers in Potsdam: 3 June – 6 September

In Potsdam, cucumber: sow for seedlings from 15 April to 9 August; plant into a greenhouse from 13 May to 6 September; plant out into open ground from 3 June to 6 September. For plants and seeds, the places nearby include Gärtnerei Schultz (garden centre, 4 km) and Gärtnerei Gentz (garden centre, 10 km); addresses and opening hours are below.

Cucumber in Potsdam: soil, season and weather

In Potsdam the soil, not frost, sets the date: the last frost is over around 5 April, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 3 June, 59 days later.

Last spring frost	5 April
Top 7 cm of soil at 18 °C	3 June, 59 days after the last frost
Into an unheated greenhouse	13 May – 6 September; May outside: 9.6 °C at night, 19.1 °C by day; card 18–25 °C
First autumn frost	21 November, 171 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	7 July – 10 October
Days left for picking	137
Daylight	15:13 on 6 May, 16:31 on 3 June
Watering outdoors when fruiting (card)	every 2 days; the driest month, September, has 7 rainy days

The same dates in Potsdam hold for Bell Pepper, Eggplant, Zucchini, Pumpkin and Watermelon.

Cucumber in Potsdam: care after planting

Planted on 3 June: in the first weeks water every 4 days.

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

10 June — feed: nitrogen

Pests and diseases of cucumber 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 Potsdam during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, August, averages 24.7 °C. Months that stay below 18 °C even by day on average: October (14.9 °C) and November (8.5 °C). Nights average below 18 °C in every month of the season, from 3.5 °C to 15.6 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	24.2	14.3	68	10	16:47
July	24.2	15.2	68	11	16:21
August	24.7	15.6	49	8	14:45
September	20.8	12.3	41	7	12:44
October	14.9	8.4	57	11	10:43
November	8.5	3.5	44	11	8:48

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around Potsdam, Berlin is 3 days earlier and Leipzig 2 days later.

City	Distance	Date	Difference
Berlin	27 km	31 May – 4 September	3 days earlier
Magdeburg	102 km	3 June – 3 September	same day
Leipzig	127 km	5 June – 2 September	2 days later
Szczecin	152 km	5 June – 2 September	2 days later
Dresden	157 km	5 June – 3 September	2 days later
Zielona Góra	175 km	1 June – 29 August	2 days earlier

Where to buy cucumber plants and seeds near Potsdam

Buy plants ready to set out from 3 June to 6 September (from 13 May to 6 September for an unheated greenhouse); seed for raising your own is sown from 15 April to 9 August. Within 15 km of Potsdam OpenStreetMap lists 16 garden centres, 1 farm-supply shop, 8 plant nurseries, 12 markets and 28 farm shops (collected 28 October 2026).

Pflanzen-Kölle Gartencenter — garden centre
Asternstraße 2, 14513 Teltow · Mon–Sat 09:00–19:00; Sun 10:00–15:00 · 14 km · pflanzen-koelle.de
Gärtnerei Gentz — garden centre
An der Chaussee 23, 14542 Werder (Havel) · Mon–Fri 08:00–18:00; Sat 08:00–13:00; Sun 08:00–12:00; public holidays 08:00–12:00 · 10 km · gaertnerei-gentz.de
Pflanzen Kölle — garden centre
Döberitzer Weg 5, 14624 Dallgow-Döberitz · Mon–Sat 09:00–20:00; Sun 10:00–15:00 · 15 km · pflanzen-koelle.de
Gärtnerei Schultz — garden centre
Kladower Straße 26, 14469 Potsdam · 4 km · gaertnerei-schulze.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.

Questions