Manitoba · Growing Zone 1a
Gardeners in Churchill, MB can expect the average last spring frost around July 14, and the first fall frost around August 18, based on historical Environment Canada frost data for the area. That gives Churchill a frost-free growing season of roughly 35 days. Actual frost dates shift by a week or two year to year, so use this as a planning baseline rather than an exact guarantee, and always check your local forecast before moving tender plants outside.
You have your Churchill frost dates. Now put them to work: GrowBlock counts back your indoor seed-starting weeks, marks your safe planting day, warns you before a frost, and lays your whole season out on one timeline.
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Most warm-season crops (tomatoes, peppers, squash) need transplanting only after the last frost has passed, and are usually started indoors 6 to 8 weeks before that date. Cold-hardy crops (peas, lettuce, spinach) can often go in the ground a few weeks before the last frost. As Churchill's first fall frost approaches in August, it's time to plan the last harvests for anything frost-sensitive still in the ground.
Approximate dates for common crops in Churchill, worked out from the local last frost around July 14. Warm crops go out after frost, cold-hardy crops a few weeks before it, and anything with an indoor start is counted back from its sow date.
| Crop | Start indoors | Sow / transplant out | Approx. harvest |
|---|---|---|---|
| 🍅 Tomato | June 9 | July 28 | October 16 |
| 🌶️ Pepper | May 26 | July 28 | October 11 |
| 🥒 Cucumber | — | July 21 | September 17 |
| 🥬 Zucchini | — | July 21 | September 9 |
| 🥬 Lettuce | — | June 23 | August 7 |
| 🥬 Spinach | — | June 23 | August 10 |
| 🫛 Peas | — | June 23 | August 24 |
| 🥕 Carrots | — | June 23 | August 30 |
| 🫘 Bush beans | — | July 14 | September 2 |
| 🥬 Kale | May 26 | June 23 | August 17 |
Guideline dates from Churchill's average frost window, not a guarantee. GrowBlock tunes these to each variety you plant and adjusts as you build your beds.
This calendar is a starting point. In GrowBlock every date is tuned to the exact varieties you plant and updates as you lay out your beds, and you can share the plan with whoever you garden with, changes show up for both of you.
Build your Churchill garden planAround July 14 on average, though it can vary by a week or two either way depending on the year.
Churchill is in zone 1a, with a frost-free season of about 35 days.
Now that you have your dates, here is how to put them to work through the season:
More how-to on the GrowBlock gardening blog.
See frost dates for all Canadian cities covered by GrowBlock.