My two retirement hobbies are reading and gardening, in that order. I've been gardening in the Reston community garden since a couple years after buying my house in 1976. Over the years my wife and I have settled into a selection of plants to grow, some to eat, some to decorate. Gardening connects me to the cycle of the seasons which was all-important to farmers when growing up. It also offers the opportunity to improve my game each year, trying different things based on the experience of last year. That's something which my mother was very much into.
The Reston garden follows organic rules, which is fine to me, except that it extends to banning preservative-treated wood for raised beds. Not good, offends mypenny-pinching soul.