To talk about a relationship trivializes something that's nobody's business.
Gardening is not trivial. If you believe that it is closely examine why you feel that way. You may discover that this attitude has been forced upon you by mass media and the crass culture it creates and maintains. The fact is gardening is just the opposite - it is or should be a central basic expression of human life.
I mean yeah I'm sure that Python and the other things have paved the way for a greater understanding of the British sense of humor but I don't think it's all that different than the American sense of humor.