Flowering plant with yellow leaves. Pics included

Shes about 3 / 4 weeks into flower and some leaves are turning yellow .
Wondering if anyone has an idea of whats going on.
Bloom fert was only a couple days ago but it has been hot where i am lately 35 derees calcius.
And the coco does seem to dry out pretty quick.
Someone help..???

Looks pretty minor so could be a lot of things
Maybe calcium def? Are you using cal mag supplement?
I grow in coco and have had a similar looking issue lately as well at 6 weeks in. Mine is more spotted than yours though.

Otherwise GrowweedEasy.com has a good plant problem diagnosis help guide.

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Looks like boron and n deff but it's kinda weird so not sure.


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The plant is fully engaged in the flower stage, so it could also be from nitrogen, but nothing to worry about at this level cause it's really harmless..