Over Easter we built a raised bed on the property at Gembrook.
It's 3m x 1.5m of untreated cypress in 75mm x 200mm dimensions bolted together with 130mm M10 stainless steel coach bolts and washers in pre drilled M8 holes. Good for at least 15 years.
Due to the slope we had to dig the bottom layer into the ground.
And once we'd done that the internal volume would have been too small for a no dig layered bed to be built. So we took the second timber bed we'd built and flipped onto the top of the first one, creating a nice depth for the initial layering. The intention was always to build up layers as required to at least 600mm in depth, but it was thought it'd take a few years to get there.
Heading out there again this Friday for me normal gardening maintenance and I'll be setting up the layers of the No Dig bed.
From top to bottom it'll be thin layers of.
Sugar cane mulch
Worm castings
Compost
Coconut Coir (I have three bricks from the worm farms that we never used)
Pea Straw
Sheep Manure
Lucerne
Cow Manure
Wood Shavings/Sawdust
Chicken Manure
Lucerne
Horse Manure
Newspaper
Blood & Bone
And all that is totally dependant on what I can get hold of on my way out there. Horse manure is generally available in bags at the front of properties on the road for a couple of bucks each. Bagged up sheep and cow manure, Lucerne, Pea Straw all from the nursery. Wood Shavings/Sawdust from the pet store where I know I can get an uncontaminated with treated pine source. Worm castings, Blood & Bone and Newspapers (collected from grandparents over the weekend) I have at home.
Layer it all down, well watered in for each layer and let it sit for a while, letting the tenant plant out stuff if they want to.