Herms in lower/ shaded larf VS. Herms in top colas
What is the difference I(genetic, stress, etc...) between herms at differant points in the plant canopy?
So i'm growing quite a few strains. Two in particular, Sinderella and ChemDog, have herms. Now, the Sinderella herms were all on lower shaded larf and bullshit that I should have pruned off initially; no big deal, i can just cut those off. On the ChemDogs however, I started seeing herms (just green stamens, not full flowers) in the colas. Full light, healthy plants, no visible stress (maybe heat? temps peak at 85ish in the mornings), etc. Plants are at Day 26, 1000W HPS, pH/EC in is about 5.8-6.0/1.8-1.9.
Any plant scientists that can explain herms, their causes, sensitivities, etc.. to me? I'm curious if it's something I can prevent in the future, or if its an inevitable genetic trait these cuts will always express.