Yield is impossible to tell its all a genetics game. also your growing skill and level of patience can come into play also I have seen alot of zittles strains do well but nobody gunna give you a guess in grams if they do well its just a guess. If you trust the breeders and your good at training you can get upto 500 gram per square meter but I have never dont that much I know people that have though they are very skilled growers and plants go for like 30-40 weeks per plant Im guessing you dont wanna grow last that long and still get the same yield im afraid thats unrealistic. Though photo period strains will always yield more than autos so your good there. Anyway best of luck I'm not even gunna bother guessing because yeah its pretty pointless haha great work bro keep it up :) 👊