I am finding that the old ways are often so much smarter than the modern. Gardening in a good example. In my Grandm’s generation they rarely bought new seed each year for their gardens. They saved seeds each year from their garden to use in the next season’s plantings.
I purchase open pollinated organic seeds for my garden. These seeds are very much like those previous generations used. We plant only the foods that we eat regularly. It makes no sense to plant a lot of cabbage, for example, if you only eat it once a month or so.
When I was growing up, we would use or can up for the pantry the harvest all throughout the summer. The last picking, which is typically the smallest amount, would be allowed to go to seed. Green beans and peas would fill the pods and be allowed to dry on the plant. When brown and dry, the pods were picked and shelled to store for next season. Melon seeds were saved when we ate the melons. The same was done with tomatoes, squash, cucumbers, and many others.
What it boils down to is that once you make that initial organic seed purchase, you can start saving seeds with that first planting and avoid having to buy seeds in the future.