Help with leaves deficiency

[Vegano]

Good morning!

I´m running a Blackshead and a White Widow, 20 days of flowering and overall they´re doing fine, but some leaves deficiency that I´m having a hard time to find out why. Please, see the pics. Thanks,

 

[Jackson]

Hey Vegano - My experience says you have cal/mag that needs to be added especially if under LED lights. Adding @Waira as he’s dynamite in helping. Helped me way too many times

Jackson

 

[Vegano]

Hi Jackson, thanks. I´m under CFL´s. The soil PH was quite high and I did a light flush and now is 7.3 and believe in another few days will be at 6.3. So calcium now seems to not be good and Mg it´s been applied weekly. I still have a feeling that´s due to PH or lack of P. And yes, @Waira is a great dedicated helper.

 

[Waira]

cheers buds!

...Vegano, you're thinking rightly mate,.. since it's hitting low, and the necrosis pattern isn't right, this isn't a Ca or Mg issue,... it's kinda weird actually, but P defc. can show a pretty broad variance of symptoms, especially if others are in the mix in,... pH is a possibility, but I'll need a whole plant pic to assess,.. no other symptoms showing, then pH may be okay but still should be checked,.. also you feeds, brand/dosage info i need,... But my bet is mainly on P defc.,.... Have you picked up an Accurate 8 soil pH probe yet? --this is the ticket for checking,.. doing run-off is lousy for accuracy and a pain in the ass to do the improved method we have here, and still it's iffy,... straight run-off is the worst, but can at least show if it badly off or not,.. a TDS/EC test of it can offer clues to see if there's excessive nute build-up, but in soil, this is more tricky than in coco/soilless,...

 

[Arthur]

Looks exactly like a lady I had that had high pH issues. Sounds like your on the right track!

 

[Vegano]

Thanks Waira and Arthur.
By so far I was able to get this PH meter . First pics of the Blackshead in center than the WW. The soil was a test that you can see in a pot pic and I´ve watered composted liquid (3-1-1) and some P Guano (0-13-0) tea. This soil mix became over strong and affected the BH and the WW but not a Punto Rojo at right in the BH pic, actually seems that she like it. Seems that the black soil I´ve added had a very high
PH runoff, over 8.0!!

 

[Vegano]

And a better overview of the WW.

 

[Waira]

Vegano, you should fill out the patient form in the highlighted section above here,.. just copy it, paste here and fill out,... more pics showing other defc.'s,... bottom pic in post [HASHTAG]#6[/HASHTAG] showing Ca defc.,... red strips on main stem hint at longer term general nute's lacking,... I'm seeing some K defc. too i think,... and from your feeds mentioned, you're not getting enough K input in there,... High pH run-off is odd, so i need soil info, and if you've amended it with a lime source,.. is your water high in mineral content?

 

[Vegano]

Thanks, Waira. I´ll give some biobloom and cal mag and in a week I´ll let you know how it´s going.