“My favorite garden is the beer garden”

The word “garden” usually evokes images of plants, such as tomato plants. “My favorite garden is the beer garden” is a jocular saying that has become popular on Twitter.
 
“My favorite garden, the one devoted to beer” was cited in print in a 2004 book. “Beer gardens are my favorite gardens” was cited on Twitter on March 13, 2010. “My favorite of all the gardens is definitely the beer” was cited on Twitter on July 8, 2015.
   
“Where can I buy seeds to plant a beer garden?” is a related beer garden saying.
   
     
Wiktionary: beer garden
Noun
beer garden ‎(plural beer gardens)
1. The outdoor section of a public house, where customers can sit in the sun and enjoy their beverages.
2. (branding, marketing) A restobar, a pub restaurant, a restaurant known for serving beer and food.
   
Google Books
Voyages of Discovery:
A Manly Adventure in the Lands Down Under
By Ken Ewell
Lincoln, NE: iUniverse, Inc.
2004
Pg. 72:
Fortunately, within two blocks of those gardens sit Mac’s Hotel, Jens Hotel, the Commercial Hotel and the Mount Gambier Hotel, that latter pub offering my favorite garden, the one devoted to beer.
 
Twitter
Courtney Chesley
‏@CourtneyChesley
Looking forward to spring tweetups in beer gardens. Those are my favorite gardens, you know.
5:03 PM - 26 Feb 2010
   
Twitter
Dominic Guglielmo
‏@DominicGug
Beer gardens are my favorite gardens http://yfrog.com/0hmkkej
3:31 PM - 13 Mar 2010
 
Twitter
KAT DADDY
‏@femmefearless
Beer gardens are my favorite gardens
10:14 PM - 29 Jun 2012
 
Twitter
Cinnamon
‏@OhYeahCHELSEAA
You wanna know what my favorite garden is ? The beer garden
10:21 PM - 17 Jun 2013
 
Twitter
The Eh Factor
‏@AngelaEhh
My favorite of all the gardens is definitely the beer.
8:52 AM - 8 Jul 2015
 
Twitter
Jason And Candice
‏@crazyfarm2015
My favorite garden is definitely the beer garden
9:56 AM - 9 Jul 2015
Woodstock, Ontario