This is a site where you can
sign up for many trade magazines - both stuff for landscaping, and for some of the auxiliary stuff many are getting into now, such as heavier construction, erosion control, etc.
Here's some of the magazines it looks like they carry (all free):
Pro
- I get this one
Turf
- I get this one
Total Landscape Care
Landscape Construction
- I get this one
Water Garden News
Compact Equipment
- I get this one
Erosion Control