We live in zone 4a/4b in Québec and we laid down the Bee Turf seeds in mid-May. We needed to fully re-plant an area that had been dug up to do some landscaping repair around our yard. We were worried that the Turf wouldn't get established fast enough. Now mid-June, the Turf is going strong. It's super thick (we potentially planted it too thickly), super lush, and such a great texture, both visually and underfoot. We're very happy with the results so far and we're excited to see how the Turf grows out over the season. If you're replacing lawn, this is an incredible option.