labifleanswered grow question 6y ago Hey there, gardener! Yes, it's possible to come across autoflowering strains that don't flower automatically, and if one of the two is almost ready, it means the other should have been too. I've seen that when an autoflower doesn't bloom under 18/6, you need to treat it like a photoperiod strain and switch it to 12/12. After that, it's possible they gave you a bad seed or that the cross didn't work out. Good luck to you, bella ciao!