Rodger asked >On 1 Mar 2009, at 11:26, Jane McGary wrote: > > > I'm very pleased that the measures I went to to protect the plants in > > December, when the temperature dropped to 14 F (minus 10 C) were > effective. > >Would you be so kind as to repeat what those measures were? I laid sheets of microfoam insulation (a product obtained from nursery suppliers, it is white closed-cell foam with a white plastic backing -- you put the plastic facing up, to ward off drips) directly on top of the plants and pots inside the frame, weighed it down a bit, closed the frames, and nailed pieces of wood siding over the vents most exposed to the east wind. The snow then coated the frame lights, giving an extra layer of insulation. There was still a lot of snow on the lights when the temperature rose into the mid-20s F/c. minus 5 C, and I knocked the snow off (up to my knees in it) and removed the microfoam. I worry about leaving it on too long and promoting rot if things start to thaw under it. The main damage seems to have been to aroids, but I think they probably will recover next year. Jane Mcgary Northwestern Oregon, USA