Here is the finished herb spiral. I have placed a lavender on the top to attract bees and the spiral is planted with strawberries, parsley, coriander and sage. I am now planning on planting some thyme in the gaps of the actual wall as I have realised that would probably work and would expand the production space and provide more nectar for bees etc. I have spent about 14 hours making this at a total cost of $75 for the plants, compost and straw. I am really pleased with it and now just hope that it works! If you start from the bottom of the post you can see the steps that I took to end up here.
Then I added the straw and watered that in and then made pockets of compost and added the plants, watering it all in at the end. There were two lizards living in these pavers when they were a stack beside the fence so I am hoping that they will find their way to this, as well as other lizards.
Then I added a layer of nasturtiums and comfrey leaves and under that is a layer of worm castings as I cleaned out the worm farm to use that too. Once again I watered the layer in the same way that each layer is watered in a no- dig garden.
Some of the herb spiral demos I have watched on You Tube use all soil, and some use all straw, whilst others use a combination and layers. So I decided to add sand first, then some wood, then cardboard and newspaper, watering between each layer.
Because it is built on concrete I decided that I should have a layer of rubble in the bottom to assist drainage. I spent three hours smashing up broken pavers with a hammer to get a layer that I was happy with.
Once I was getting down to the last few pavers I needed to make sure that there were going to be enough to make the centre higher and taper it down. It took a few readjustments but is almost finished here.
Once I had worked out my spiral, based on the size of the pavers and the shape that it needed to fit into, I started building it layer by layer. We have had a pile of pavers for a long time and as we do not want to put more pavers down this seemed like a good use of them. The concrete underneath is old and ugly so it will have to look better than that.