Tomato · Kolpino, St.-Petersburg, Russia

When to plant tomatoes in Kolpino

Main outdoor window

12 Jun - 3 Jul

A climate estimate. Check your soil, forecast and cultivar.

Timed from last spring frost

5 May

In Kolpino, on your chosen risk.

Ready to pick

11 Aug - 5 Sep

If you plant at the start of the window.

The average last frost. Half of all years are later than this.

Estimated soil-warming check. The historical frost estimate is 19 May. An air-temperature model suggests soil suitable for tomatoes may warm to about 15.5°C (59.9°F) around 12 June. This is a planning estimate, not a soil measurement. The calendar uses the later date; measure your bed at sowing depth and check the forecast before planting.

Step by step in Kolpino

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

24 Mar - 14 Apr

Six weeks before your last frost, under cover or on a windowsill.

Plant out

12 Jun - 3 Jul

Delayed by a soil-warming estimate derived from historical air temperatures. The frost-only date would be 19 May. Measure your soil before planting.

Harvest

11 Aug - 5 Sep

Frost tolerance
Tender
Damaged below
0°C (32°F)
Days to maturity
60–85
Min soil temp
15.5°C (59.9°F)
Spacing
60 cm
Sowing depth
6 mm (0.2 in)
Sun
Full

Tomatoes through the year

Against the frost risk in Kolpino

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Tomatoes

Frost risk Start indoors Plant out Harvest Today
Open My Garden

Seasonal context

Rainfall and the growing season in Kolpino

July has the highest average precipitation (98 mm); February has the lowest (41 mm). Compare this pattern with the planting windows and your water supply.

Jan 49 mm
Feb 41 mm
Mar 43 mm
Apr 52 mm
May 70 mm
Jun 90 mm
Jul 98 mm
Aug 97 mm
Sep 63 mm
Oct 73 mm
Nov 66 mm
Dec 58 mm

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 Kolpino

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.

NASA POWER climate averages, 1995–2024
MonthAverage lowAverage highFrost days
January -12°C (10.4°F) -6.8°C (19.8°F) 30.3
February -11.5°C (11.3°F) -5.5°C (22°F) 27.5
March -6.6°C (20.2°F) -0.5°C (31.2°F) 29.1
April -0.1°C (31.8°F) 7.6°C (45.6°F) 16.0
May 5.7°C (42.3°F) 14.4°C (58°F) 2.3
June 11.2°C (52.1°F) 19.1°C (66.5°F) 0.0
July 14.1°C (57.5°F) 21.7°C (71°F) 0.0
August 12.8°C (55°F) 20.2°C (68.4°F) 0.0
September 8.2°C (46.8°F) 14.9°C (58.7°F) 0.0
October 2.6°C (36.7°F) 7.2°C (44.9°F) 8.3
November -3.6°C (25.4°F) 0°C (32°F) 21.2
December -9.2°C (15.5°F) -4.6°C (23.7°F) 29.0

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 Kolpino

  • July is the wettest month in the rainfall grid, averaging about 98 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 Kolpino.

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 163 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.

See every crop timed for Kolpino →

Nearby

Tomatoes in places close by

Pushkin 12 km Saint Petersburg 26 km Gatchina 32 km Peterhof 41 km Petrodvorets 47 km Sosnovyy Bor 86 km

Also in Kolpino

Other vegetables to time

Lettuce half hardy Potatoes half hardy Courgettes tender Sweet peppers tender Carrots hardy Cucumbers tender Green beans tender Peas hardy Garlic very hardy Chilli peppers tender Sweetcorn tender

Growing tomatoes in Kolpino

Can I grow tomatoes in Kolpino?

The calendar estimates a planting window, not a guarantee of success. July is the wettest month in the rainfall grid, averaging about 98 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 tomatoes in Kolpino?

Aim for 12 Jun - 3 Jul in an average year. If you would rather not gamble on the weather, wait until 12 Jun - 3 Jul - by then frost has finished in nine years out of ten.

Can I plant tomatoes earlier in Kolpino?

The historical frost estimate is 19 May. For Tomatoes, an air-temperature model estimates soil warmth of about 15.5°C (59.9°F) around 12 Jun. 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 Kolpino?

The estimated period is 11 Aug - 5 Sep, 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.