Rick, the 26 and 27'F readings were from two inexpensive remote Springfield units hanging on a string in the corner of two backyard gardens where the damage occurred. I don't have a thermometer in the front mixed garden where there was no damage but it had to be warmer there. The garden in the front receives radiant heat from the relatively warmer lake water while my gardens in the back are shadowed from that heat source by the house and trees. By experience of living here for over 40 years a temperature difference of 1.5 to 2.0 degrees from the front (facing Lake Michigan) of the house to back porch is typical when the air over land here is cooler than the water. The temperatures in the area were quite variable, too. My neighbor's weather station a short distance from here recorded a low of 29.5. (see Picture). Cliick to enlarge. I had 32'F on a roofed over patio/porch where I had about 70 pots of seedlings.
