“Gardeners always know the ground rules”

A gardening pun is:
 
“Gardeners always know the ground rules.”
 
The “ground rules” joke was posted on the website Pun of the Day in 2001.
 
     
Pun of the Day
Great One Liners of the Month
Current Positions for July 2001
(...)
5. Gardeners always know the ground rules.
   
Google Groups: alt.humor.puns
Puns of the Weak 1-31-03
Stan Kegel
1/31/03
(...)
Gardeners always know the ground rules.  (Pun of the Day)
 
Google Groups: alt.humor.puns
Puns of the Weak Special: 100 Top One-Liners
Stan Kegel
5/25/03
The 100 best one-liners as chosen by the readers of Mike Bull’s “Pun of the Day” http://www.punoftheday.com
(...)
85. Gardeners always know the ground rules.
 
Twitter
GG PA IS BEST
‏@IowaDawg
Gardeners always know the ground rules. (true)
2:18 PM - 15 May 2009
 
Twitter
RICHI∑ FR∑SH.™
‏@shoehefner
“Gardeners always know the ground rules!” -Woody Paige
4:19 PM - 20 Jan 2010
 
Dave’s Daily Quotes
AUG 24, ’12 7:48 PM
Gardeners always know the ground rules.
 
Facebook
Joanna’s Dealicious Treats
February 6, 2016 ·
Gardeners always know the ground rules.