There are some pretty good auto breeders out there if you look. I've had great luck with Ronin Gardens, Magic Strains, and Gnome Automatics all available at DC Seed Exchange. I like to grow autos while my photos are vegging as I give my photos at least 60 days of veg time if possible. Most of mine finish around 90 days but some strains will take a little longer. I choose mainly indica strains so they usually have a pretty similar flower time. Plants that are foxtailing will look done mostly with a lot of brown pistils and then start throwing new calyxes and pistils, usually on top. It can be an indicator of too much light or just that your taking the plant far into bloom and it's genetics are prone to it. You can see how your plant is uniform in white pistil coverage. That shows it's not ready yet and just needs more time.