If yard work isn't work for you, as it is not for me (most of the time), then I can't think of a better way to spend a Sunday with your hands covered in God's creation. I learn God's simple lessons every time I'm out there.
If you don't keep up with the small things they can become big things overnight.
When the plant doesn't have to spend time getting rid of it's dead stuff because you've done that for the plant, the plant looks better and is healthier. God may help those who help themselves, but he certainly smiles on those who help others.
You should poke around at your garden while you are dead tired during the week and would rather do anything than pull weeds or haul amender. On Sunday, you should look at your garden and think about all Jesus gave up for us.
Meanwhile, let's not go judging how our husbands spend the day. Maybe he's only reading about the Lord.