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.
One of the most powerful devices of poetry is the use of distortions. You can go from talking about the way a minute passes to the way a century passes or a lifetime.