Soil for a large raised bed - Tucson
I posted this elsewhere, but got no responses...this seems like a good group of people from AZ, so I hope someone can help me out!
I have a nearly complete raised bed that will need 5 or 10 yards of soil. It's going to be a general purpose bed, with various small trees/shrubs/succulents/etc. in it. I need some advice on what kind of soil to use. Most of the plants we'll be using would probably be OK in the native soil, so I'm thinking that a sandy screened topsoil would probably be OK. But, many of the vendors around here have a raised bed mix that contains a lot of compost. I know that the soil isn't great, but I don't want to make it too rich.
Here's my wife's first-pass list of ideas. This area will be spine-free.
Echeveria (will try a few things)
Graptoveria 'Fred Ives'
Ã¯Â¿Â½Mangave 'Macho Mocha'
Yucca 'Blue Boy'/"desmetiana"
Maybe some bigger stuff too:
Sophora secundiflora 'Silver Peso'
Thanks for any advice!