Q: Why do I spend so much time and effort in the garden now, as I creep up on my 40th birthday?
A: So that I won't have to spend so much time and effort in the garden later, as I creep up on later birthdays.
I'm working on layering my beds with enough foliage to keep out all but the most stalwart weeds, and I look forward to the time when a weekend can be spent idly looking at what I have wrought, rather than working. Work in progress. This is only year 5, and some of the beds I am working in were not beds when we moved in.