I don't generally have much free time, and if I do, it's usually short periods here and there. So, projects that would take a couple hours end up taking me much longer to do. I get them done, but it has definitely made me better at time management by necessity. It involves planning things out, keeping running lists of projects, breaking them down into segments, things like that. So, to actually
answer the question, my hobby would basically be an extension of pre-season planning combined with the small busy work things that satisfy creative needs while recycling.
-Make seedling ID stakes for seedling flats.
These can be made from many things, but I save the larger white plastic yogurt containers for this. Just cut them into strips vertically, and write on them with a Sharpie marker.
-Make seedling pots. I make mine from the taller aluminum energy drink cans. Poke about 5 drain holes around the bottom, cut the top off smoothly with scissors.
-Make a seed starting rack. I've seen ones made from wire racks and grow
lights and a fan. The seedlings were very healthy and strong.
-Make garden ID stakes from wine corks and bamboo skewers. This one is on my list to try since I already have the materials on hand. I'll be painting the corks, then write the plant name in marker or paint on it. I don't always mark my plants since I haven't ever had a problem remembering, but I'm growing lots of hot peppers next year & want to know what's what.
-Make trellises for pole beans.
I have some tree branches, and am planning on making some rustic looking trellises to grow pole beans on.
-Plan & replan the garden many times up until the day the last plants are in the ground.
-Reorganize your seed collection.
-Scrounge some reclaimed lumber to make raised bed frames or obelisk trellises.
I like to build from things normally thrown away, so reclaimed/recycled things are my material of choice...even though there's admittedly more work involved.