Making Plunge Beds in the Glasshouse

Fab OB, I was going to build another raised bed for veg in my side yard (work area) but I think one of these would be more useful to me. It is only a small area & very protected & I could make a cover for it. Would it work outside?

Hi W. I don't know if you have ever been to Hidcote, but there is a covered alpine growing area there. All that has is a roof, which is covered in Winter, but open for the rest of the year.
There is no reason at all why a plunge bed like this could not be built. In our previous house I had what we called The Table Bed. This was paving slabs stood on brick pillars with a wall on the top, of about 9 inches depth. It was filled with a gritty compost and I grew a lot of really nice plants in it. But, it could have been left with just sand. That had no covering at all. No pictures sadly as it was before we owned a camera.

Thanks OB I will give it some thought, too cold to get out there yet.

I would advise against metal legs. I had a blacksmith make me a frame of square section metal tube. Plenty strong enough but when I put the first concrete slab on it began to s-w-a-y! Not what you want in a glass house. I substituted thick marine ply board for the slabs and tied the frame into an existing structure. This has carried an 8inch deep sand plung for the last ten years. Should I ever build another I think that I would go for concrete block pillars as Owdboggy showed in his previous blog