Auto Purples - Pyramid Seeds

I'm liking these Autos a lot. They're small but they're fastaf and absolutely gorgeous, especially as I've lucked out on purple phenos for each plant. I haven't seen any more herming, there are loads of bud sites coming in, everything's in full swing for flowering. I've also already written a note to myself about filling up the pots properly too :) So, I've been reading up on possible pH/deficiency stuff because the colour change has been abrupt this week, fearing something very wrong was going on. They've had an increased feed of veg nutes for the stretch, and a lick of bloom, but organic nutes take a short while to become available. I'm still not sure if this is normal colouration for the phenotype, it looks like late-flowering stage fading on older leaves(where the light is strongest, I'm keeping an eye on it. It's also the perfect time to start some new bubs!(1x each of 00 seeds Blueberry, Sweet Critical, and White Widow, all Autos). They'll have their own diary.