I believe the modest increase is home food growing is mostly a search for quality. Gardening has always gone in cycles. The current cycle seems to be driven by "foodies".

That was the case through 2007, but there's substantial anecdotal evidence that this year's jump in gardening was significantly larger than previous years, and that the extra was largely motivated by economics.

I know two people, not normally known for their vegetable gardening, who have taken it up this year.

In their cases they are not driven by the glamour of freshly-grown Rocket for yuppie dinner parties.