Best soil for a raised bed?

Carolyn Craft via pbs
Sun, 13 Jul 2014 14:21:01 PDT
Mike, I like to add 'Dry Stall' to the mix. It's pumice and can be  bought 
in large bags at 'Sam's downtown feed store' on San Carlos blvd.  It  is 
cheaper than buying pumice at nurseries.
In a message dated 7/13/2014 12:34:28 A.M. Pacific Daylight Time, writes:

I'd like  to ask for the wisdom of the list.

I'm building a raised  bed this summer to hold surplus bulbs. It'll be
contained by pressure  treated lumber, about seven inches (18 cm) deep, 3'
wide (1 m) and 25' long  (8 m). It will have hardware cloth on the bottom,
and will sit over native  soil that has been solarized.

Since I'll be using it for  surplus bulbs, I don't want to take the time and
expense to do the  pots-in-plunge media thing that many folks on the list 
in beds.  Instead, I'll just plant the bulbs directly into the bed, allowing
them to  mix gloriously over time. (Well, I hope it'll be glorious.)

My  question to the list is, what sort of soil do you recommend that I use  
the bed? The same as my potting medium, or something else? The problem  with
my usual potting mix is that it breaks down in a few years, and I want  this
bed to last.

The bulbs in the bed will be Moraeas,  Glads, and a few other miscellaneous
winter-growing things from South  Africa and California.

Any advice on the soil (or anything  else)?



San Jose, CA  (zone 9, min temp 20F /  -6C)

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