British Columbia · Growing Zone 4b
Gardeners in Prince George, BC can expect the average last spring frost around May 25, and the first fall frost around September 17, based on historical Environment Canada frost data for the area. That gives Prince George a frost-free growing season of roughly 115 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 Prince George 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 Prince George's first fall frost approaches in September, it's time to plan the last harvests for anything frost-sensitive still in the ground.
Approximate dates for common crops in Prince George, worked out from the local last frost around May 25. 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 | April 20 | June 8 | August 27 |
| 🌶️ Pepper | April 6 | June 8 | August 22 |
| 🥒 Cucumber | — | June 1 | July 29 |
| 🥬 Zucchini | — | June 1 | July 21 |
| 🥬 Lettuce | — | May 4 | June 18 |
| 🥬 Spinach | — | May 4 | June 21 |
| 🫛 Peas | — | May 4 | July 5 |
| 🥕 Carrots | — | May 4 | July 11 |
| 🫘 Bush beans | — | May 25 | July 14 |
| 🥬 Kale | April 6 | May 4 | June 28 |
Guideline dates from Prince George'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 Prince George garden planAround May 25 on average, though it can vary by a week or two either way depending on the year.
Prince George is in zone 4b, with a frost-free season of about 115 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.