stress, bugs,mold, neglect,,all reasons generations suffer...
keep a good enviroment, clones of clones, stay great moms for years n years, adapting better to your grow with each generation...clone away, just dont neglect them and they will repay you with years of hefty harvests..
i feel like the seeds we pay for get so many dif phenios with each seed, once you find that one you like and take care of it, it can supply you with moms for a very long time..i just wish wen paying for seeds, each one was what we pay for,, i hate phenio hunts, i like uniform, stable breeds..each seed is what you like..but thats just not how it is,, so make S1's of all your favorites and if stress,bugs,etc destroy your mom u have back ups...grow well to all..