Tomato · Siverek, Şanlıurfa, Turkey
When to plant tomatoes in Siverek
Main outdoor window
29 Apr - 20 May
A climate estimate. Check your soil, forecast and cultivar.
Timed from last spring frost
2 April
In Siverek, on your chosen risk.
Ready to pick
28 Jun - 23 Jul
If you plant at the start of the window.
The average last frost. Half of all years are later than this.
Step by step in Siverek
Download these planting dates (.ics)
Import into Apple Calendar, Google Calendar or Outlook. Dates use the selected risk level and are planning estimates, not frost alerts.
Each window is a planning range. Check the forecast, soil and cultivar before planting; a later date is not automatically safer in hot or wet conditions.
Start indoors
19 Feb - 12 Mar
Six weeks before your last frost, under cover or on a windowsill.
Plant out
29 Apr - 20 May
Delayed by a soil-warming estimate derived from historical air temperatures. The frost-only date would be 16 Apr. Measure your soil before planting.
Harvest
28 Jun - 23 Jul
Tomatoes through the year
Against the frost risk in Siverek
Seasonal context
Rainfall and the growing season in Siverek
December has the highest average precipitation (62 mm); August has the lowest (1 mm). Compare this pattern with the planting windows and your water supply.
During wetter months, check that beds and containers drain after heavy rain. During drier months, plan how you will keep seeds and new transplants watered. Monthly averages can hide long dry spells and intense storms; they do not show soil moisture, humidity or this week's weather.
Source: NASA POWER, corrected MERRA-2 precipitation, 2001–2020. Values are approximate monthly totals, including the water equivalent of snow, from the nearest 0.5° × 0.625° grid cell. This reference period differs from the temperature record. Rainfall provides context and does not change the calculated planting dates. Method and limitations.
Monthly growing conditions in Siverek
Compare the planting window with the local temperature pattern. These are historical monthly averages, not this year's forecast or measured soil temperatures. Average frost days do not tell you whether a particular night will freeze.
| Month | Average low | Average high | Frost days |
|---|---|---|---|
| January | -3.4°C (25.9°F)25.9°F (-3.4°C) | 5.3°C (41.6°F)41.6°F (5.3°C) | 26.2 |
| February | -2.2°C (28.1°F)28.1°F (-2.2°C) | 7.8°C (46.1°F)46.1°F (7.8°C) | 20.4 |
| March | 1.2°C (34.2°F)34.2°F (1.2°C) | 12.5°C (54.5°F)54.5°F (12.5°C) | 11.2 |
| April | 5.9°C (42.6°F)42.6°F (5.9°C) | 18.3°C (65°F)65°F (18.3°C) | 1.4 |
| May | 10.9°C (51.6°F)51.6°F (10.9°C) | 24.7°C (76.5°F)76.5°F (24.7°C) | 0.0 |
| June | 16.3°C (61.4°F)61.4°F (16.3°C) | 32.7°C (90.8°F)90.8°F (32.7°C) | 0.0 |
| July | 20.7°C (69.2°F)69.2°F (20.7°C) | 37.7°C (99.8°F)99.8°F (37.7°C) | 0.0 |
| August | 21.1°C (70°F)70°F (21.1°C) | 37.4°C (99.3°F)99.3°F (37.4°C) | 0.0 |
| September | 16.5°C (61.7°F)61.7°F (16.5°C) | 31.6°C (88.8°F)88.8°F (31.6°C) | 0.0 |
| October | 10.5°C (50.9°F)50.9°F (10.5°C) | 23.7°C (74.6°F)74.6°F (23.7°C) | 0.1 |
| November | 3.2°C (37.8°F)37.8°F (3.2°C) | 14.8°C (58.6°F)58.6°F (14.8°C) | 5.9 |
| December | -1.3°C (29.8°F)29.8°F (-1.3°C) | 8.1°C (46.5°F)46.5°F (8.1°C) | 19.6 |
For tomatoes, also check drainage, sunlight and cultivar requirements. See the rainfall context above; humidity, irrigation and local pest pressure are not calculated.
Local growing check
Before choosing tomatoes for Siverek
- Average daytime highs reach at least 32°C in June, July, August. Plan establishment and flowering with local heat advice. This screen highlights hot months; it is not a crop-specific damage threshold or a heatwave forecast.
- December is the wettest month in the rainfall grid, averaging about 62 mm. Check how your own bed drains and plan watering around actual soil moisture; monthly rain totals are not an irrigation schedule.
The temperature and rainfall tables on this page show the underlying climate estimates. How these suitability checks work · Record what happens in your garden.
Before you plant tomatoes
Use the calendar to plan ahead, then check the conditions in your own garden.
- Measure the soil at sowing depth. Aim for at least 15.5°C (59.9°F); the calendar estimates soil warmth from air temperatures and cannot measure your bed.
- Check the local overnight forecast before planting out. Delay planting or keep protection ready if frost is forecast, even after the historical last-frost date.
- Harden off plants raised indoors: gradually expose them to outdoor light, wind and temperature before their final move into the bed.
- Use the maturity range on your seed packet when choosing a variety. Cold, short days and transplant stress can make harvest later than the calendar estimate.
Choose the growth habit before choosing the support
Give tender young plants a gradual transition outdoors. Wait for warm soil and suitable night temperatures, and keep frost protection available when the forecast is uncertain.
Set supports in place early for varieties that need them. Water consistently as fruit develops; small pots can dry rapidly even when the wider garden still looks damp.
Outdoor wet weather can increase disease pressure, including blight. Choose a suitable variety, leave room for airflow and inspect plants rather than assuming a warm month is automatically a good one.
Growing in a container
Compact bush varieties suit smaller growing spaces. Use a substantial pot with drainage and support any variety that needs training.
Further reading: RHS tomato growing guide . General crop guidance; local dates on this site are calculated separately. Source checked 18 September 2026 by Safe to Plant; this is not an expert review.
How the dates are calculated and their limits · Keep a growing record · Report a local discrepancy
Why these dates
Give tender young plants a gradual transition outdoors. Wait for warm soil and suitable night temperatures, and keep frost protection available when the forecast is uncertain.
Check the named variety and local forecast before exposing young growth. The catalog cold-damage figure is a reference, not a guarantee: plant age, acclimatisation, wind and the duration of a freeze affect damage.
This calendar uses frost-relative offsets as a starting point. Tomatoes are timed from 6 weeks before that frost for an indoor start, with planting out 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Siverek.
The calendar also applies a soil-warming estimate derived from historical air temperatures. Where that estimate is later than the frost-based date, it delays the window. Soil in your own garden can warm earlier or later; a thermometer at sowing depth is a better final check. Cold, wet conditions can slow germination and increase decay risk.
The median frost-free season here is 230 days, against 60 to 85 days to maturity for this crop counted from planting out. That margin is what decides whether a late sowing is worth attempting.
Also in Siverek
Other vegetables to time
Growing tomatoes in Siverek
Can I grow tomatoes in Siverek?
The calendar estimates a planting window, not a guarantee of success. Average daytime highs reach at least 32°C in June, July, August. Plan establishment and flowering with local heat advice. This screen highlights hot months; it is not a crop-specific damage threshold or a heatwave forecast.
When should I plant tomatoes in Siverek?
Aim for 29 Apr - 20 May in an average year. If you would rather not gamble on the weather, wait until 1-22 May - by then frost has finished in nine years out of ten.
Can I plant tomatoes earlier in Siverek?
The historical frost estimate is 16 Apr. For Tomatoes, an air-temperature model estimates soil warmth of about 15.5°C (59.9°F) around 29 Apr. This is not a soil measurement or a forecast. Check your bed at sowing depth; cold, wet conditions can slow growth and increase decay risk.
When might tomatoes be ready to harvest in Siverek?
The estimated period is 28 Jun - 23 Jul, based on 60 to 85 days from the modeled planting date. Cultivar, planting material and growing conditions can change this interval; check the plant as well as the calendar.
How much frost will tomatoes tolerate?
Check the named variety and local forecast before exposing young growth. The catalog cold-damage figure is a reference, not a guarantee: plant age, acclimatisation, wind and the duration of a freeze affect damage.