With spring here, there is a flurry of gardening coverage. But that may mask a media category at a bit of a crossroads.

Gardening is still one of the most popular outdoor leisure activities, but it tends to be a hobby for those 40 and older, which works against it when it comes to coverage.

"The hot demographic is 18 to 34, and it's been a great disappointment to me that they haven't embraced gardening at the same levels as ...