Do Subpods work as efficiently in raised garden beds as buried in the soil?
Subpods work just as efficiently in raised garden beds as they do buried into the ground, as long as your area is not overly hot in the summertime (prolonged days of temperatures over 95F or 35C). Raised garden beds will be a couple of degrees warmer than in-ground set ups.
In such conditions, it is helpful to locate the bed in a place that gets shade later in the day, and/or provide some shade cloth over the bed to keep the worm bedding within Subpod from overheating. We have some instructions on how to build a shade system for your Subpod here:
As long as the soil temperature of the deeper regions of the garden bed away from the sides is below 95F (35C), the worms will survive. They will however, slow down feeding when the temps within the Subpod bedding go above 30C (86F).