Calcium deficiency or heat stress?

[Matfkn]

Hi , plant is og kush from fastbud, in middle of flowering and those "spots" start to appear, I'm not able to say if is calcium deficiency, heat/light stress or maybe something else?

Feeding (4 L)
Calmag 4ml
A+B bloom 5ml each
Just start with Explode and I give her just a taste 1ml.

No, I don't test PH, since she's in soil.
That's a couple of pics of one leaves.
Any ideas ?

Thanks in advance and happy growing!

 

[kfigerm]

No, I don't test PH, since she's in soil.

wrong assumption. Check somehow.
you talk about heat stress - does she drink those 4l a day due to heat? How often do you feed? What is the waters Ca "base"?
At first glance it looks like too much K...but I'm not too experienced - someone step in please.

 

[Matfkn]

wrong assumption. Check somehow.
you talk about heat stress - does she drink those 4l a day due to heat? How often do you feed? What is the waters Ca "base"?
At first glance it looks like too much K...but I'm not too experienced - someone step in please.

I was checking pH before and after few research and trial I figured out that for me is not working . ( Don't want to start a discussion about soil pH , myth or true..)
They drank 4L per day because are big plants.
Feeding every time with half dosis that Dutchpro suggest.

That's a couple of pic of them ...

 

[Matfkn]

I was checking pH before and after few research and trial I figured out that for me is not working . ( Don't want to start a discussion about soil pH , myth or true..)
They drank 4L per day because are big plants.
Feeding every time with half dosis that Dutchpro suggest.

That's a couple of pic of them ...

Before you ask, yes I do topped them all at sixth internode and yes I do transplant them
(Other 2 debatable argument but as you can see they work very well for me)

 

[kfigerm]

then i think that come from some broken tissue due to too much drinking too fast. As it is near the edges.
But they look really dark green, so coult be a starting Ca lockout as well imo.
I'd watch and decide later what to do. No reason for me from the pics to become too nervous.
Good luck! - No discussions.

 

[Matfkn]

then i think that come from some broken tissue due to too much drinking too fast. As it is near the edges.
But they look really dark green, so coult be a starting Ca lockout as well imo.
I'd watch and decide later what to do. No reason for me from the pics to become too nervous.
Good luck! - No discussions.

No nervous mate, but I always have this problem in half flowering and I'm trying to understand what is the cause, that's all, said that plants are looking good and I don't complain.
Happy growing.

 

[Matfkn]

Any other options? Thanks

 

[tronN00dles]

I get orange spots like that when I feed too much calcium or if my water is too hard. I see you’re feeding higher doses of calcium in soil. Drop it all together and your problems will probably go away. Your soil probably has some limestone in there already for stable pH (you say you don’t need to check pH which implies pH stability which implies limestone buffering, ie, a source of calcium).

Your nutes will also have calcium so you have calcium on top of calcium on top of calcium, leading to lockout.

 

[Mañ'O'Green]

Hi , plant is og kush from fastbud, in middle of flowering and those "spots" start to appear, I'm not able to say if is calcium deficiency, heat/light stress or maybe something else?

Feeding (4 L)
Calmag 4ml
A+B bloom 5ml each
Just start with Explode and I give her just a taste 1ml.

No, I don't test PH, since she's in soil.
That's a couple of pics of one leaves.
Any ideas ?

Thanks in advance and happy growing!View attachment 1499275View attachment 1499276View attachment 1499277

That is usually caused by too much Nitrogen locking out the K. But you may be using too much calcium?

 

[Matfkn]

Many thanks, that exactly what I did, cut in half Calmag, now is 2ml every 4L ( suggested dose is 1ml per liter) ,
cut A/B bloom (less N) and raise a bit Explode 0.5ml per liter (more P and K) and it seems to be stopped.
Very useful information, many thanks guys and if you want I keep you updated ..
Happy growing