12/31: We harvested this planting of arugula in the PSG just a couple of weeks ago. It kept GROWING with NO supp[emental heat until then. Even now, on the last day of 2017 and after many days of single digit and even subzero temperatures overnight, these tough little plants have not given up! You can see what the inside temperature was on this afternoon. I wrote in my calendar that it was -6F when we got up this morning.