Sweet pea · Mardin, Mardin, Turkey
When to plant sweet peas in Mardin
Main outdoor window
2-23 Mar
A climate estimate. Check your soil, forecast and cultivar.
Timed from last spring frost
28 March
In Mardin, on your chosen risk.
First flowers
31 May - 20 Jun
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 Mardin
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
17 Jan - 7 Feb
Ten weeks before your last frost, under cover or on a windowsill.
Sow for overwintering
5-26 Jul
Counting back 124 days from your first frost so the crop matures in time.
Sow direct
2-23 Mar
Delayed by a soil-warming estimate derived from historical air temperatures. The frost-only date would be 14 Feb. Measure your soil before planting.
Plant out
2-23 Mar
Delayed by a soil-warming estimate derived from historical air temperatures. The frost-only date would be 28 Feb. Measure your soil before planting.
In flower
31 May - 20 Jun
Sweet peas through the year
Against the frost risk in Mardin
Seasonal context
Rainfall and the growing season in Mardin
December has the highest average precipitation (62 mm); August has the lowest (0 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 Mardin
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 | -2.3°C (27.8°F)27.8°F (-2.3°C) | 7.1°C (44.7°F)44.7°F (7.1°C) | 24.1 |
| February | -1.3°C (29.7°F)29.7°F (-1.3°C) | 9.4°C (48.9°F)48.9°F (9.4°C) | 18.0 |
| March | 2°C (35.6°F)35.6°F (2°C) | 14°C (57.2°F)57.2°F (14°C) | 8.8 |
| April | 6.8°C (44.2°F)44.2°F (6.8°C) | 20.1°C (68.2°F)68.2°F (20.1°C) | 0.7 |
| May | 11.8°C (53.2°F)53.2°F (11.8°C) | 26.9°C (80.4°F)80.4°F (26.9°C) | 0.0 |
| June | 17.2°C (62.9°F)62.9°F (17.2°C) | 34.5°C (94.1°F)94.1°F (34.5°C) | 0.0 |
| July | 21.7°C (71.1°F)71.1°F (21.7°C) | 39.1°C (102.3°F)102.3°F (39.1°C) | 0.0 |
| August | 21.8°C (71.2°F)71.2°F (21.8°C) | 38.6°C (101.5°F)101.5°F (38.6°C) | 0.0 |
| September | 17.3°C (63.1°F)63.1°F (17.3°C) | 33.1°C (91.5°F)91.5°F (33.1°C) | 0.0 |
| October | 11.6°C (53°F)53°F (11.6°C) | 25.3°C (77.6°F)77.6°F (25.3°C) | 0.0 |
| November | 4.4°C (39.9°F)39.9°F (4.4°C) | 16.3°C (61.3°F)61.3°F (16.3°C) | 3.8 |
| December | -0.3°C (31.4°F)31.4°F (-0.3°C) | 9.6°C (49.3°F)49.3°F (9.6°C) | 16.2 |
For sweet peas, 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 sweet peas for Mardin
- 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 sweet peas
Use the calendar to plan ahead, then check the conditions in your own garden.
- Measure the soil at sowing depth. Aim for at least 7°C (44.6°F); the calendar estimates soil warmth from air temperatures and cannot measure your bed.
- Frost tolerance does not make saturated or frozen soil suitable for planting. Wait until the bed can be worked without smearing or compacting it.
- 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.
Keep ornamental sweet peas separate from edible peas
Choose a climbing or dwarf variety before planning supports. Provide a suitable cool growing season, rich drained soil and steady moisture. Hot humid weather can shorten the display even when plants are watered.
Pick flowers or remove spent blooms regularly to prevent seed-pod development from ending flowering early. Train climbing stems while young and inspect for slugs and aphids. Record the cultivar's scent and stem quality as well as flower count.
What to record this season
Which sowing produced useful scented stems before hot weather or pod formation reduced flowering? Add the cultivar, sowing date and conditions to your growing record so you can compare next season.
Further reading: NC State Extension: Lathyrus odoratus . General crop guidance; local dates on this site are calculated separately. Source checked 19 September 2026 by Safe to Plant; this is not an expert review.
The reference describes plant identity and cultivation. Its regional calendar months and hardiness observations do not validate the calculated dates for another location.
How the dates are calculated and their limits · Keep a growing record · Report a local discrepancy
Why these dates
Choose a climbing or dwarf variety before planning supports. Provide a suitable cool growing season, rich drained soil and steady moisture. Hot humid weather can shorten the display even when plants are watered.
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. Sweet peas are timed from 10 weeks before that frost for an indoor start, with planting out 4 weeks before it, and this page simply resolves those offsets against the frost date computed for Mardin.
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 244 days, against 90 to 110 days to first flower for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Growing sweet peas in Mardin
Can I grow sweet peas in Mardin?
The calendar estimates a planting window, not a guarantee of success. 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.
When should I plant sweet peas in Mardin?
Aim for 2-23 Mar in an average year. If you would rather not gamble on the weather, wait until 16 Mar - 6 Apr - by then frost has finished in nine years out of ten.
Can I plant sweet peas earlier in Mardin?
The historical frost estimate is 14 Feb. For Sweet peas, an air-temperature model estimates soil warmth of about 7°C (44.6°F) around 2 Mar. 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 sweet peas flower in Mardin?
The estimated period is 31 May - 20 Jun, based on 90 to 110 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 sweet peas 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.