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.
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.
GrowBlock builds your whole season timeline around dates like these automatically, indoor seed starting, transplant windows, and harvest, tuned to Prince George specifically.
Plan your Prince George gardenAround 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.