Not to defend the plant or the breeder but I was pretty clear that it was recommended to veg the f35 under 24h of blue light. It is no surprise that your beans flipped on 18h of sodium light.i am having the exact problem with fd 35. also for a plant that doesnt stretch much i woulnt want to see one that does. makes hindu kush look like a short fat girl. fifty percent of them anyways. very dissappointed in this strain. it is nowhere near stable. my clones are flowering while rooting under 18 hrs of 600 hps. never seen less light than that. these plants are in my opinion very close to an auto. you cannot veg to size as doc says. successfully femmed one with cs first time trying ever and im tossing the seed. boo hoo. dont get me wrong the doc has some awesome strains..this isnt one of them. ive grown five of his and this is the only one i consider a waste of electricity..peace out merry xmas
On the other hand I have 3 which went auto and I think I have 7 that are vegging very nicely under 24h t5 lighting. I have some other "semi-auto" strains and often it is a shock (poor feeding, pH, temperature) which will cause these plants to turn. Aaaanyway I'm taking cuttings of the remaining 7 and then turning the dark cycle up on the remaining moms until I find the ones with the preferred critical dark cycle and then hitting them with CS. I would suggest doing the same. The progeny is fairly diverse. Time will tell.