Some of my favorite gardeners online:
Urban Organic Gardener - http://www.urbanorganicgardener.com/Life on the Balcony - http://lifeonthebalcony.com/
Vertical Veg - http://www.verticalveg.org.uk/
The aerial edible garden & other urban adventures - http://aerialediblegardening.wordpress.com/
To help you start and plan your own vegetable garden:
smart gardener fresh - http://blog.smartgardener.com/Still missing veggies for dinner for the week? Order some! Try:
Info about community-supported agriculture or CSA - http://www.localharvest.org/csa/Biokiste (Germany) - http://biokiste-hamburg.de/biokisten
Hoflieferant (Germany) - http://www.bio-hoflieferant.de/
Need supplies?
Burpee's Seeds - http://www.burpee.com/Stein's Garden & Gifts - http://www.steingg.com/
Dehner (Germany) - http://www.dehner.de/garten.html
Max Bahr (Germany) - http://www.maxbahr.de/
...or tips?
HGTV gardening blog - http://blog.hgtvgardens.com/Better Homes & Gardens (incl. planning, plant info, regional tips, etc.) - http://www.bhg.com/gardening/
Follow other gardeners and their findings on Pinterest: http://pinterest.com/all/?category=gardening
Check out what other gardeners are saying on Twitter: https://twitter.com/search?q=%23gardening&src=typd