white widow

2g pot but 10" tall, I can already see several bright white roots coming out the bottom. It popped above ground aug 31. OceanForest with aurora newts

i topped her the 4coala method and she only 6" tall. If i wait til she gets total 12" --

A - how much bigger will she get in flowering? Does topping reduce the max height of a plant?

B - Will the 2g pot - 7.5x7.5x10in be big enough to finish in?

EDIT: C - If I flower only her under 400w whats an expected yield for a rookie?

She will get from 2-3 times bigger...maybe even more, depends on genetics...you can finish in 2 Gallon, but I highly recommend 5 gallon, and yield is the ultimate variable...gold standard is about a half g per watt...please, somebody correct me if i am wrong...hope the was helpful.

A) you topped an autoflower, it will stunt its growth and it has to heal now. Since it only has a certain life cycle and you cant prolong the veg period to give it time to heal you are not going to get a full yield off it. It poped 20 days ago, you probably have a good 6-7 weeks left of growth, it will probably double in size unless your topping hurt it too badly.
B) It sounds like you have your soil mixture correct, and are slightly underwatering it if you are seeing lots of roots coming out of the bottom of a pot that size already. Weed roots search for water, if you dont give it enough you'll see lots of roots down bottom, which is good for it, but you need to compensate with a larger pot
C) 400w for a single autoflower is severe overkill. If you didn't top it you'd definitely get really good results from it.

Good luck, start another one, don't top it this time

Did I miss where he mentioned auto lower?

Thank you all for answering!

It's not an auto, and my reason for topping is I only have about 36" of actual plant growth height once I deduct the pot height and light. Since topping it's began developing 4 branches growing upward and I'm LST training them already.

Roots - My humidity is crazy low since going HPS (20-30%) and I have to water every day and a half. The soil just dries out that fast. I was worried I was over-watering, but it's not droopy at all. And your statement seems to say that it could actually take more water.