When to plant tomatoes in Erzurum: 25 May – 26 June

In Erzurum, tomato: sow for seedlings from 13 March to 5 May; plant into a greenhouse from 4 May to 26 June; plant out into open ground from 25 May to 26 June.

Tomato in Erzurum: soil, season and weather

In Erzurum the soil, not frost, sets the date: the last frost is over around 11 May, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 25 May, 14 days later.

Last spring frost	11 May
Top 7 cm of soil at 15 °C	25 May, 14 days after the last frost
Into an unheated greenhouse	4 May – 26 June; May outside: 4.6 °C at night, 18.4 °C by day; card 16–27 °C
First autumn frost	16 October, 144 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	3 August – 4 September
Days left for picking	74
Daylight	12:44 on 3 April, 14:39 on 25 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 2 rainy days

Tomato in Erzurum: care after planting

Planted on 25 May: in the first weeks water every 4 days.

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

25 May — feed: balanced (NPK)
22 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 Erzurum during the tomato season

Days average above the tomato card's 16–27 °C in July (28.7 °C) and August (30.2 °C). Nights average below 16 °C in every month of the season, from 3.7 °C to 13.7 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	18.4	4.6	97	15	14:22
June	24.7	9.2	40	9	14:59
July	28.7	12.7	22	5	14:45
August	30.2	13.7	9	2	13:47
September	24.5	9.1	15	3	12:30
October	17.1	3.7	34	6	11:12

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Erzurum, Trabzon is 59 days earlier and Gyumri 5 days later.

City	Distance	Date	Difference
Trabzon	180 km	27 March – 23 August	59 days earlier
Batumi	195 km	18 April – 23 August	37 days earlier
Gyumri	239 km	30 May – 30 June	5 days later
Diyarbakır	240 km	16 April – 5 August	39 days earlier
Van	240 km	28 May – 9 July	3 days later
Yerevan	277 km	11 May – 13 July	14 days earlier

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