Nutrient problem

[Ko0bLiz3k]

Hi guys i would like to ask what should i do to get of rid these yellow leaves because i thought its light burn but then black spots appears....
im kinda new in growing and im trying to learn everything from books or net but there is many answers about these yellow leaves and spots so i dont know if its over nutrient or it has deficiency
all three leaves are from top (northern light)
got 3 auto/blueberrys(these are without problems) and 2 auto/northern lights which wont start flowering even in sixth week so i switched them on 12/12 to manually start flowering stage
i will be glad for any answer or tip thanks.
i can get you more photos if you need

 

[steve]

you have caught it early, once one see an plant issues you are all ready 2 weeks behind in fixing it. Remember auto's require one 1/2 amounts of nutrients. ?? the auto's you mentioned should all ready be' in flower - being that they are in week 6 generally it takes 8-10- weeks for harvest. consider flushing

 

[Ko0bLiz3k]

im watching them every day so when i saw it i started to do some research...friend bought me alga bloom so giving them 2ml everytime i watering them but it seems too much so i lowered dosage.
blueberrys automatically switched on flowering with no problem even on 18/6 and nutrients are also fine but these two northern wont start flowering so they are 2 weeks behind schedule thats reason why i had to switch 12/12 hopefully it will help.
but im worried its something with magnesium or mangan etc. what do you think ?
PH is around 7-7,15 on each

 

[NebulaHaze]

The most common reason to see deficiencies is the pH is too high or low. In soil you want to be 6-7, so it's possible the pH is causing the symptoms. If you are not using a Cal Mag supplement that might help, too

 

[Ko0bLiz3k]

I already figured it out i was just dumb
problem was in high humidity at night caused by offline vents before sleep because it was noisy so it climbs up around 90%
then flowers start taking water from air instead soil so ph went up and it could not take any other nutrients like cal or mag etc.
also humidity caused problem with flowering on northern lights so they cant create these white little hairs.
i wont make same mistake again so nonstop airflow is already on.
even with high humid i didnt get any mold so gg.
i will post final results after harvest
Thank you so much for tips

 

[insomniaczzz]

With humidity that high, you may need to put dehumidifier in there. I mean, that is really high.

 

[Ko0bLiz3k]

they were off at night so it climbs up to 90% now i have it nonstop on so its about 40-45% and that should be fine

 

[NebulaHaze]

Thanks for sharing what the symptoms ended up being caused by! You never know if this information will help someone else in a similar situation. It's pretty neat you figured out something unusual like that, sounds like you're really on top of watching out for your plants!

 

[Ko0bLiz3k]

No Title

So Ph is finally set to 6,5 and hope its stable so there are results
First blueberry is big step ahead from others but i dont think its problem it will be sooner harvested i think
second looks very promising and finally northern lights after solving all problems are already flowering but after 9 WEEKS ! (if i named it car instead auto its very slow car...)
blues are about 4 weeks in flowering so i hope they will be huge at the end
Looking forward to post harvest time enjoy and thanks for help