As for growing autoflowers most are going to be good in the 15L pots. But if you were just going to grow some photos then I could see maybe using the larger pots. Just all around the 15L seem to be able to do it all.I see there are also 25L pots available, I'm growing in 15L(3.9gal) - first time using autopots for me, is anyone growing in the 25L pots (6.6gal) and are there any distinct advantages going big?