I wouldn't wait near 20 days. As soon as you can slide out the roots from the cup with the soil intact is when to do it, dryer is easier. Leave her outside and use neem if you see bugs. Dilute more when young but go full strength when it starts to look like a plant. Stop neem after it's in flower. And I don't think the soil will help you in flower so be ready with the P and the K when you see pistils. The clock ticks on autos so you need to be ahead of the game.That was what kinda motivated me to make the little transplant cup. Thought that would make it minimally invasive so to speak. Ive gotten a lot of different information when it comes to the autos. I really don’t know what to do honestly. I had to get her going because I wanted her to finish before frost. Not sure that will happen but I can always bring her in if it is getting close. So I needed to start her ASAP. And my new pots aren’t coming till Friday. After talking to y’all today I may not wait till day 20 to transplant. I may do it as soon as I can. Until then I will probably try to keep her outside as much as I can so that when she gets in her big pot I can hopefully just leave her out there then. She will be in foxfarm ocean forest soil so I may not really have to add any nutes for a bit except maybe a little calmag. I am also tempted to maybe use some micro doses of a couple foxfarm organic products...the microbe brew and the root drench. Thoughts on that? I’m thinking like maybe 1/8th strength for the first month.