Over the 7 years since we opened rosybee, the business has been gently growing (thanks everyone!) and we finally ran out of space in our big polytunnel. To give us more capacity and a better growing environment for seedlings, in January we had Keder install a smaller (8m x 4m) propogation house. We chose Keder because the 'bubblewrap' walls provide both great insulation and light filtering for baby plants.
So far it seems that, with low level heat along each bench, the new house keeps the air temperature about 2 degrees warmer than the main polytunnel. This is just enough to make a difference. The plants are looking very happy.