Hi Baylee- I think there's a couple things going on here,... looks like we have scattered spotting that smacks of Ca defc., and upper leaves that are yellowing, veins included in the more advanced symptoms, which hints at an immobile nute' defc.,... (LOL! -sorry Nammy, I think N defc. is out because of this,...)... Likely it's Fe, or less so, Sulphur (these two are so close in symptoms, it's hard to make a call with just a pic or two, but S defc. is rare),... muddying the water is the fact that leaves getting tapped out of all goodies also go overall-pale like this, including the veins, BUT usually, it's the lower leaves that get tapped first, not ones so high up,...which makes me think defc.; pH in is fine going in, but it's the actual soil pH that would tell us the most, especially for Fe, which starts to get locked out very fast when the soil pH starts getting into the upper 6's,... (that first pic show something very uncommon: veins going pale with interveinal spaces still green!- :dunno: that's diagnostic of something, but I'm not sure of what; almost always, the spaces in between go pale long before the veins color fades out) *** Okay, I dug around some more; looks like S defc. is more likely to cause the veins to pale-out than Fe defc.,... So to cover bases, treat for the Ca defc. with your Ca-Mg supp', and try some epsom salts (MgSO4) for the S defc. (1 level tsp/qt),... this far into budding, I hesistate to recommend foliar, even though this is the fastest way into the plant, and bypasses any potential soil pH issues-- (residues and mold issues).... *** as to why one of the same strain is fine, the other troubled,... pheno diff's can do this, and more likely, pH diff's in the soil... each pot is it's own micro-environment, and can drift a different way from another, despite near-identical treatments and conditions,...