Green Poison, Space, Pineapple, (pics + details)

Ok.

I have Space, Green Poison, Pineapple Express, Strawberry Cough and Kalishnakova.
The Strawberry and Kalishnakova are fine and not affected like the other three.
I keep my watering/feeding the same for all of them.

Where to begin..

All are in Ocean Forest. I use Botanicare nutes..CalMag, Karma, PureBlend Pro Grow/Bloom, and CN17 Ripe.
Ive been growing for years and never had a problem like this before.
Water going in stays around pH7, and exits the pots around 6.2.

I first started noticing what looked like a K deficiency on the Green Poison. Yelowing starting at the tips and moving towards the petioles, with browny/rusty spots mostly along the veins.
About 2 weeks later I began to notice the brown/rust spots (mostly along the veins) on both Space and Pineapple.
Strawberry and Kalishnakova are unaffected.
Pics are enclosed and labeled.

AND

My first generation of clone from the Green Poison is exhibiting similar coloration.
It would lead me to believe something was wrong with the Green Poison at a genetic level, or was just a one off "bad seed". However, 2 others are showing similar things in flowering (not veg, yet[knock on wood]).

Thoughts?
Questions?
Clarifications?

Bumpski bump.

Looks like it's heat related to me, just a guess though

I wish it was as simple as heat..

Temps go about 83 with light on..70 with light off.

Maybe potassium? I'm just throwin out some ideas xD

It doesn't look like Potassium def., looks more like a lack of Calcium to me (but seems there are more going on).
Do you use RO-water?

If you have given too much P, it can make Calcium unavailable (but also K).
So if you have tried to fix it by giving different nutrients and it only gets worse, it could be "nutrient-ratio" lockout. If so, I would flush with a little cannazym (or water).

pic 1, 2, and 3 = calcium deficiency
pic 4 = boron deficiency?! but probably just calcium deficiency, and K deficiency
pic 5 = calcium deficiency and K deficiency


boron deficiency
View attachment 1797529


K deficiency: early sign = singed tips


calcium deficiency
View attachment 1797531


you need to find out the npk of the stuff your using

Appreciate the responses.

Probably dealing with a lockout..

I havent had a digital pH meter for the last year..finally got a new one about 10 days ago and my runoff was in the 5.6-5.8 range. Ive begun remedying that..Hopefully that will work for me going forward.

...and the spots have transferred to my vegging cloned Pineapples. And Im starting to see it in the K-Kova.

Its just hard to believe it's a deficiency when they get fed the recommended doses.. seeing as how conventional wisdom has always stated to use around half the recommended doses.

are you sure you do not have spider mites? i mean if it spreading, just sayin'.

Ive had mites before..there are definitely no pests involved.

It's crazy.. 5 strains and some of them show it, some dont..but I treat them all the same way.