Google made it easier to submit sitemaps. All you have to do is go to the search console and give it the URLs for your sitemaps. I was reading the help files, which didn't take that into account (so, that's why I was learning about robots.txt—to direct it to where my sitemap file was).
Anyway, now hopefully we'll get more traffic.
Hopefully, Google will automatically add all new posts with the atom-feed-thing—but, if they don't, I made a Python script I can use to gather the URLs and do it manually (which is what I did for the first sitemap).
Location: SW Idaho, USA
USDA hardiness zone: 6
Elevation: 2,260 feet Profile post