More nutrients or fewer? Argh!

Grow Cycle
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Hey folks,

Does have one have a sense of what might be going on here? Uppermost leaves are lighter than those below, and are now starting to develop browning and other kinds of discolouration.

Thanks for tips or advice or comments!

Ps. I’m growing in soil (BioBizz Light mix augmented with vermiculite and perlite), and feeding a suite of compatible organic fertilizers, also from BioBizz (Grow, Heaven Top Max, and Bloom, plus adding CalMag). The light’s a Migro Aray 150, 40cm above canopy, currently at DLI 32, PPFD 500. (this is about 75% power). It’s a Royal Haze auto in week 4 of flower.

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Good luck with it grow friend. Someone will stop by and help

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Excess calcium causing phosphorus and magnesium deficiency? Ive never seen this before so maybe wait for someone else to answer.

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I’m no Pro but maybe this can help

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Suggest doing a runoff test for both PH and TDS. Some fade in flower is normal.

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Definitely gotta check the numbers, something seems a bit off.

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