You said the last few generations, and I wonder...are you running beans that you got from a breeder / seed bank or are these beans that you are propagating yourself? Reason I ask is, MAYBE, certain strains are / have become stabilized (or de-stabilized) to the point that a specific pheno, that 2 yrs. ago was advertised to flower (harvest ready) in 77 days may now be ready (or closer to ready) at say day 43. Cause ain't a one of them look like they aren't doing EXACTLY what & how they're supposed to. In my understanding of the dolomite lime, it is more for amending large areas, plots or raised beds of soil and it takes much longer to act and lasts longer. I think the "Garden lime" is a hydrated lime ( is it fine powder, white??) and for what we do (indoor / tent grows) I think it's the better choice. I have used it a few times myself with good results, but I use it to bring my soil back to neutral (7.0) and then start my Ph adjusting from there (everything is @ 6.4 going in and try to keep my soil @6.4) and I grow everything in the almost exact same pots (size & shape) as yours. Mine are 8"x8". Random thoughts!!! (I'm Sunday stoned!!)