Looks like we beat the average first frost day of September 14 again this year! Although not as impressive as October 1 last year, the forecast is looking good for the next week.
So far only the Amaranth has taken a hit. Everything else appears to still be growing. So I guess this is a "moderate" first frost, no "heavy" killing frost yet (unlike Edmonton, sorry guys). According to Environment Canada, measured at the Calgary ariport (same elevation as the Middle Earth Garden), we had -0.5 C on September 18. Everything survived this first light frost. Last night was -1.1 C.
The Amaranth doesn't seem to have any seeds yet, that I can find. I will take a closer look tomorrow. So may not get any Amaranth seeds this year. This spring was exceptionally slow germination, starting them inside would help alleviate this risk.