Activity tracking for gardening or outdoor work?

Very unlikely.

That's unfortunate because I believe there are many people, who wear a smartwatch or fitness tracker, who would appreciate the ability to track this type of activity. All my prior smartwatches had "gardening" listed as an activity, so I was surprised to not see it listed on my Sq 2. 

Why not simply use Cardio? Or copy Cardio and call it Gardening? At the end of they day you will be keeping track of time and hear rate anyhow

Thanks for the idea - I'll give it a try!