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.
Cities all over the world are getting bigger as more and more people move from rural to urban sites but that has created enormous problems with respect to environmental pollution and the general quality of life.