Are you dividing them onto context lists? For example, loosen the soil might be on a gardening list which you'd only want to do when you have time off and it's sunny. Buy some plants and a hose might be on a DIY store list, and you'd only want to see those when you're out and about. Start some seeds might be on a greenhouse list which you can do when it's raining, but not when the kids are around, etc.
It's a problem I've run into again lately, after a change in circumstances. I got a little excited about having time available, and moved a load of stuff off of my someday maybe lists, flooding my NA lists in the process. Apart from errands, all of my contexts are available all of the time, so it become overwhelming to have so many choices. I've switched to only adding tasks to my NA lists that I want to do in the next couple of weeks, and moved the rest back to SM temporarily. Feels much better.