Does the size of container /indoor plastic in Coco coir make a difference in flowering?

Yes I grow in coco and tbh I would not actully think it that serious aslong as its over 20l you can grow a nice large plant I would say with coco its more of an oxygen game coco works best when it has lots of oxygen and is slightly damp not moist. I personally use I think the same around that amount 35 litres in the queens lol I have been advised by Autopot that adding air will always produce much better stronger and longer root systems the use of fabric pots air pots ect will boost your plant health considerabally autopot even sell the air domes that are designed to rund from an air pump in your root zone constantly feeding the roots air. your plants are looking ace and it seems your gunna have a nice even canpoy and they are all healthy so tbh I wouldnt not worry about it too much and defo dont transplant in the first 20 days of flower in my opinion too much stress can lead to stress herms and in a well filled out tent like that it would be a nightmare not worth thinking about lol Best of luck anyway bro :) 👊

It might have only looked like a gallon root ball but surely it was bigger if you vegged for any significant time. Anyhow. I’ve pulled 3 oz off 2/3 gallon coco. It does make a difference still but you can get away with smaller containers if you get everything else right. Roots love that extra air in coco, so usually the roots are 2-3x more in the same amount of spade as compared to soil.

Yes, Its more difficult to keep the root zone at optimal conditions for the plant. The more roots the more that can be absorbed and transferred to the plant. You can get similar results with smaller containers but its a lot more work, Like your doing feeding more often. But with more watering's comes more chance to rot the root's especially if you are using plastic containers that restrict the amount of oxygen that can get to the roots. Also she will be more picky with nutrients. Its easier to under/over feed because you have less root mass to work with. Happy Growing.