Observation

I have learnt this year that no.1 GH is a lot darker at this time of year than new boy GH, the mere 3-4ft up the incline allows the winter sun to find new boy  above neighbouring trees, where no.1 is still overshadowed.  Hopefully this will translate into a warmer environment in spring.  I also have to consider the orientation of CFB rows so as not to block the sun.

My greenhouse was fine until the numpty on the plot behind me built a flaming shed next to it.