Note that this is a different issue from that dealt with in the prior FAQ, where we were talking about beds that contained plants right through the winter. The present FAQ, by contrast, relates to empty beds, and the question regards whether the old mulch is still viable (and, if so, what you should do with it)....
The screen of the iPad Mini, left, is 7.9 inches on the diagonal, compared with 9.7 inches for the iPad Air. Apple is now selling the new iPad Mini, the smaller brother of the pleasing iPad Air, which I reviewed a couple of weeks ago.
Both the iPad 4th Gen and iPad Air models have 1 GB of RAM, but otherwise are quite different internally. Specifically, the iPad 4th Gen models have a dual core 32-bit 1.4 GHz Apple A6X processor and originally were available with 16 GB, 32 GB, or 64 GB of storage (with a 128 GB configuration added later).