I am no expert like you guys but from my experience and being from the region where KUSH was born… I too believe that some strains such as the KUSH is prone to foxtailing but two factors are influencers climate and NPK ratio…Just my thought
That grow is one of the reason I added the C02 system, but I will say those kush buds are awesome smoke. I think there will come a time when Kush strains are all I grow.