Flowering issue that can’t seem to flush...

Hi there,

I noticed this issue starting about 2 weeks ago much less than the symptoms it’s showing now. Started off with just a few little rusty looking spots towards the top leaves of the plant. I don’t think it’s fungus I have good ventilation and keep my humidity at 40% now I’m in flower. It looks orange and rusty spots then turned the leaves brown crispy and they are turning up. The problem only seems to be at the top leaves and not at the bottom.The leaves are now starting to die off I’m really at a loss. I’ve tried flushing several times, after using 3 gallons of 5.5 RO water I reduced the Ph from 7 to 6.5 I know 5.8 is best for coco but it didn’t seem to make much of a difference how ever much water I added.
I must note I saw the problem get worse when I tried to boost my nutes but I only increased from 200 to 350ppm as they were in flower. Is this a toxicity or a deficiency any help would be really appreciated feeling defeated at this point on my first grow.
I think the darker one is about 4 weeks into flower and 2 weeks for the bigger one.
Growing with:
150w Mars hydro led
70/30 coco pearlite
Temps 24-27•C
40% humidity
Royal gorilla autos from queen seeds
Flora trio series nutes

Jdog23 said:

I must note I saw the problem get worse when I tried to boost my nutes but I only increased from 200 to 350ppm as they were in flower.

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Are you saying you only use 200 ppm of nutrients? You should be in the 600-800 range on the 500 scale or 1.2-1.6ec, ph 5.7

UpstateRecGrower said:

Are you saying you only use 200 ppm of nutrients? You should be in the 600-800 range on the 500 scale or 1.2-1.6ec, ph 5.7

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my mistake I increased the ppm from 300s to 550 at pre flower and think that might of caused the issue however having done abit of research today I’m going to start treating it as a phosphorus deficiency and up the bloom for the next week and see how it reacts. Will keep this thread updated for anyone who might face the same issue

They should be getting fed at least 500 ppm, ph'd to 5.8ish, twice per day. You're way underfeeding, that will fix them right up.

Rurumo said:

They should be getting fed at least 500 ppm, ph'd to 5.8ish, twice per day. You're way underfeeding, that will fix them right up.

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Ahh okay Ive been so anxious of over feeding this whole grow with it being my first grow and Everyone warning how easy burning is :/, I’m in 5 gallon fabric pots and run to 20/30% run off, they aren’t fully dry between waterings should I still feed twice?

yes nute 500-600 PPM, 6.0 PH. 2 times per day and flush real good every 7-10 days. best to have a auto water system. look it up