another blizzzard warning and another cold spell on the way

Today it was 36 degrees  and there was melting snow dripping from the roof making little puddles.  And then this afternoon they issued a blizzard watch for Sunday with snow possible beginning Saturday and more 20 below cold on Monday.  The greenhouse is struggling in this cold.  With the two little milk house heaters running it is still getting cold over night.  And today when it is warm outside and it was 60 degrees in the greenhouse the soil in the planters closest to the glazing was frozen.  I know that the plants will eventually bounce back but they are not getting bigger very quickly.  The soil in the gutter planters and the plants in the middle of the room are not frozen so it is time to do some rearranging. 

I have been stalling making the changes.  I kept thinking that we must be done with the really cold weather but I fear I have been deluding myself.  So I moved the tables away from the glazed roof into the middle of the room.  I lost a bit of table space and so for now I have some planters on the floor.  I have them sitting on overturned planters so that they are not sitting right on the tile floor.  I moved the heat sink back under the tables in their new location and I cut rigid foam insulation into the pockets made by the rafter tails.  If this doesn't make a difference I will  consider a layer of plastic  on the inside to make the glazed roof double walled at least part way up.  I hate the thought of covering up the beautiful roof. 

Here are a couple of pictures of the new arrangement.  It is more crowded and I am sure that I will be tweaking it as the days go on.