Spinach · Sosnovyy Bor, Leningradskaya Oblast', Russia
When to plant spinach in Sosnovyy Bor
Main outdoor window
18 Apr - 2 May
A climate estimate. Check your soil, forecast and cultivar.
Timed from last spring frost
4 May
In Sosnovyy Bor, on your chosen risk.
Ready to pick
28 May - 7 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 Sosnovyy Bor
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.
Sow for overwintering
29 Jul - 19 Aug
Counting back 64 days from your first frost so the crop matures in time.
Sow direct
18 Apr - 2 May
Delayed by a soil-warming estimate derived from historical air temperatures. The frost-only date would be 23 Mar. Measure your soil before planting.
Harvest
28 May - 7 Jun
Spinach through the year
Against the frost risk in Sosnovyy Bor
Seasonal context
Rainfall and the growing season in Sosnovyy Bor
August has the highest average precipitation (93 mm); February has the lowest (43 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 Sosnovyy Bor
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 | -9.2°C (15.4°F)15.4°F (-9.2°C) | -5°C (23°F)23°F (-5°C) | 29.5 |
| February | -9.5°C (14.9°F)14.9°F (-9.5°C) | -4.6°C (23.7°F)23.7°F (-4.6°C) | 27.1 |
| March | -5.8°C (21.6°F)21.6°F (-5.8°C) | -0.6°C (31°F)31°F (-0.6°C) | 29.1 |
| April | -0.2°C (31.7°F)31.7°F (-0.2°C) | 6.4°C (43.6°F)43.6°F (6.4°C) | 15.7 |
| May | 5.6°C (42°F)42°F (5.6°C) | 13°C (55.4°F)55.4°F (13°C) | 1.6 |
| June | 11.2°C (52.2°F)52.2°F (11.2°C) | 17.9°C (64.2°F)64.2°F (17.9°C) | 0.0 |
| July | 14.5°C (58°F)58°F (14.5°C) | 20.7°C (69.3°F)69.3°F (20.7°C) | 0.0 |
| August | 13.6°C (56.5°F)56.5°F (13.6°C) | 19.7°C (67.5°F)67.5°F (19.7°C) | 0.0 |
| September | 9.2°C (48.6°F)48.6°F (9.2°C) | 14.7°C (58.5°F)58.5°F (14.7°C) | 0.0 |
| October | 3.8°C (38.8°F)38.8°F (3.8°C) | 7.6°C (45.7°F)45.7°F (7.6°C) | 5.0 |
| November | -1.6°C (29.2°F)29.2°F (-1.6°C) | 1.5°C (34.6°F)34.6°F (1.5°C) | 17.9 |
| December | -6.2°C (20.8°F)20.8°F (-6.2°C) | -2.6°C (27.3°F)27.3°F (-2.6°C) | 27.1 |
For spinach, 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 spinach for Sosnovyy Bor
- August is the wettest month in the rainfall grid, averaging about 93 mm. Check how your own bed drains and plan watering around actual soil moisture; monthly rain totals are not an irrigation schedule.
For a different warm-season leaf crop, read the Malabar spinach guide and check its local requirements.
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 spinach
Use the calendar to plan ahead, then check the conditions in your own garden.
- Measure the soil at sowing depth. Aim for at least 4.5°C (40.1°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.
- 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.
Grow true spinach in the cooler part of your season
Keep the seedbed moist and make small, repeated sowings. A short row harvested regularly is often more useful than many plants reaching their best size together.
Choose bolt-resistant varieties for warmer sowings and hardy varieties for overwintering. Light shade can help in warm conditions, but it does not turn extreme summer heat into a suitable season.
Malabar spinach, New Zealand spinach and perpetual spinach are different plants. They can be useful alternatives, but their timing and growth habits should not be copied from this true-spinach calendar.
Growing in a container
Spinach suits containers with moisture-retentive compost and drainage. Check pots frequently during dry weather.
Further reading: RHS spinach 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
Keep the seedbed moist and make small, repeated sowings. A short row harvested regularly is often more useful than many plants reaching their best size together.
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. Spinach are timed for direct sowing 6 weeks before it, and this page simply resolves those offsets against the frost date computed for Sosnovyy Bor.
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 171 days, against 40 to 50 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Sosnovyy Bor
Other vegetables to time
Growing spinach in Sosnovyy Bor
Can I grow spinach in Sosnovyy Bor?
The calendar estimates a planting window, not a guarantee of success. August is the wettest month in the rainfall grid, averaging about 93 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 spinach in Sosnovyy Bor?
Aim for 18 Apr - 2 May in an average year. If you would rather not gamble on the weather, wait until 18 Apr - 2 May - by then frost has finished in nine years out of ten.
Can I plant spinach earlier in Sosnovyy Bor?
The historical frost estimate is 23 Mar. For Spinach, an air-temperature model estimates soil warmth of about 4.5°C (40.1°F) around 18 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 spinach be ready to harvest in Sosnovyy Bor?
The estimated period is 28 May - 7 Jun, based on 40 to 50 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 spinach 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.