Am I missing something here??

[MMAjay420]

for the last few days i have been having issues with only 3 plants in particular. One Hero OG and two Chem 91 x Skunk 1. The lower leaves have been yellowing and dying. the rest of my plants are strong and healthy but these guys are having a hard time it appears. Please take a look at my pix and any info you could help me wih, would be appreciated.

 

[MMAjay420]

Oh and they are 2 weeks to the day into flower, in thier own blackout tent. I feed em all the same, a combo of Sweet citrus, dark energy and kool bloom. right now they are at half strength nutes due to me thinking it was over fertilized but nope, they are still yellowing. I flushed em good for 3 days and still no results that im happy with.

 

[Sat X RB]

I can't bring up any but yr first pic ... can't see much detail either. can you take some CLOSER shots? (yes, I 've taken my glasses off.)

first thing: could be ... because only certain strains are affected ... that these strains simply lose their bottom leaves earlier than other strains. I know the Sativa I grow lose leaves early and progressively up the plant at early onset and all thru flowering.

second thing: at flowering time plants get hungry for Ca. like, the flowering supplement I use has 7% Ca.

But at this stage of plant life there's a need to look at closeups of yr new growth before any diagnosis.

cheers!