Citation of what? That seeds grow if you plant them? It isn't a crop, it is vegetables. You would hopefully plant things you want to eat, but I do potatoes,

Citation of what? That seeds grow if you plant them? It isn't a crop, it is vegetables. You would hopefully plant things you want to eat, but I do potatoes, carrots, parsnips, turnips (rutabagas if you are american), celeriac, broccoli, cabbage, tomatoes, peppers, beans, peas, corn, cucumbers, squash, pumpkins, melons, onions, garlic, leeks, beets, and some salad stuff. I'm sure I'm forgetting something but you get the idea. Plus there's the perennials which obviously you don't have to plant every year like asparagus and most berries and herbs. I spend precisely two days per year on all non-harvesting activities but that's because I start everything from seed instead of buying started plants so one day to plant the seeds and one day to transplant them 2 months later. It is cheaper and lets you get a lot of heirloom varieties your local nursery probably won't carry, but it is more work. I use only four simple non-powered tools assuming you count a popsicle stick as a tool. If you are going to grow your mulch because you don't have trees or neighbors doing it for you then you'll have to have something to cut your mulch crop with too.