May 11, 2018

Vermicomposting in Arizona Summer Heat?

A great question from Marie:

I used to do worm composting when I lived in Washington state. Now that I have moved to Arizona, and it is approaching summer, I am concerned about temperatures too hot for worms. I don’t have space to keep a bin inside, so that isn’t an option. I was thinking of using a container garden that I built using large concrete blocks. (The rectangular kind with two big holes in them that are used for walls). It is 2 feet x 6 feet wide, and 2 feet deep. It is shaded during quite a bit of the day by a large citrus tree. It gets regular water through a drip irrigation system. I was going to use a thick layer of pine needles to cover the top and encourage the worms to move deep into the center of the bin. Do you think that this would work?
Thank you for your expertise!

Hi Marie,
You are 100% correct in assuming that outdoor vermicomposting during an Arizona summer will likely be very challenging. But the good news is that the idea you shared sounds very much on target in terms of the sort of system that could potentially work!

For the benefit of others reading, I am going to start by laying some groundwork based on what we are dealing with here. To be honest, I don’t really know how hot it can get during an Arizona summer, but I’m am going to guess that 100+ F is pretty common over the course of several months.

Short of setting up some sort of (more…)

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