When to Plant Kai-lan in Lévis, Quebec, Canada

Step by step in Lévis

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 direct

28 May - 11 Jun

Two weeks after your last frost.

Harvest

1 Jul - 31 Oct

Sow in succession. A single sowing gives you a single glut. Sow a short row every 21 days through the window above and you get a steady supply instead.

Frost tolerance

Half-hardy

Damaged below

-4°C (24.8°F)

Days to maturity

50–70

Min soil temp

10°C (50°F)

Spacing

30 cm

Sowing depth

10 mm (0.4 in)

Sun

Full

Kai-lan through the year

Against the frost risk in Lévis

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Kai-lan

Frost risk Sow direct Harvest Today

Seasonal context

Rainfall and the growing season in Lévis

July has the highest average precipitation (124 mm); February has the lowest (64 mm). Compare this pattern with the planting windows and your water supply.

Jan 66 mm

Feb 64 mm

Mar 72 mm

Apr 93 mm

May 95 mm

Jun 113 mm

Jul 124 mm

Aug 108 mm

Sep 108 mm

Oct 118 mm

Nov 90 mm

Dec 96 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 Lévis

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
Month	Average low	Average high	Frost days
January	-18.9°C (-2.1°F)	-9.2°C (15.5°F)	30.8
February	-18°C (-0.4°F)	-7.5°C (18.5°F)	28.2
March	-11.8°C (10.8°F)	-2.6°C (27.3°F)	30.4
April	-3.2°C (26.2°F)	5.8°C (42.5°F)	23.3
May	4.3°C (39.7°F)	14.9°C (58.9°F)	4.8
June	10.2°C (50.4°F)	19.9°C (67.8°F)	0.0
July	13.5°C (56.2°F)	22.2°C (71.9°F)	0.0
August	12.6°C (54.7°F)	21.5°C (70.6°F)	0.0
September	8.4°C (47°F)	17.7°C (63.9°F)	0.3
October	2.3°C (36.1°F)	10.2°C (50.4°F)	10.0
November	-5°C (23.1°F)	1.8°C (35.3°F)	25.8
December	-13.6°C (7.4°F)	-5.4°C (22.3°F)	30.5

For kai-lan, 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 kai-lan for Lévis

July is the wettest month in the rainfall grid, averaging about 124 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 kai-lan

Use the calendar to plan ahead, then check the conditions in your own garden.

Measure the soil at sowing depth. Aim for at least 10°C (50°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.
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.

Cut tender kai-lan flowering stems before they become coarse

Choose a cultivar for your local temperature pattern and keep the bed fertile, moist and drained. Some selections tolerate warmer conditions than many other brassicas, but local performance still varies.

Cut usable young flowering shoots before stems become fibrous. Leave healthy growth where the cultivar is intended to produce side shoots, and inspect the regrowth before planning a second harvest. Record stem tenderness as well as length.

What to record this season

At what stage were stems tender, and did useful side shoots develop after cutting? Add the cultivar, sowing date and conditions to your growing record so you can compare next season.

Further reading: Brassica oleracea alboglabra Chinese Kale PFAF Plant Database . 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.

Plants For A Future compiles botanical and cultivation references. This is general species guidance, not a local field trial or evidence that every cultivar will crop in your climate.

How the dates are calculated and their limits · Keep a growing record · Report a local discrepancy

Why these dates

Choose a cultivar for your local temperature pattern and keep the bed fertile, moist and drained. Some selections tolerate warmer conditions than many other brassicas, but local performance still varies.

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. Kai-lan are timed for direct sowing 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Lévis.

The median frost-free season here is 145 days, against 50 to 70 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.

See every crop timed for Lévis →

Nearby

Kai-lan in places close by

Québec 3 km Trois-Rivières 116 km Drummondville 143 km Sherbrooke 166 km Saguenay 180 km Saint-Hyacinthe 189 km

Also in Lévis

Other vegetables to time

Tomatoes tender 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 kai-lan in Lévis

Can I grow kai-lan in Lévis?

The calendar estimates a planting window, not a guarantee of success. July is the wettest month in the rainfall grid, averaging about 124 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 kai-lan in Lévis?

Aim for 28 May - 11 Jun in an average year. If you would rather not gamble on the weather, wait until 8-22 Jun - by then frost has finished in nine years out of ten.

When might kai-lan be ready to harvest in Lévis?

The estimated period is 1 Jul - 31 Oct, based on 50 to 70 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 kai-lan tolerate?