Green manure...

... is what is growing in these raised beds (honestly!). You can see espalier fruit trees growing against the warm south-facing wall of the garden. The light really did look like this - the sky above the garden was very dark, but the sun came out well to the south and low in the sky which gave this scene its ultra-vivid colours.

PS This garden is my place of work, although I'm not a gardener - it's a place where people recovering from mental health problems come to work on their way back into the world outside. I'm the admin worker for the service and it's the best job I've ever had.