Yellowing in flower

[MrAmnesia]

 

[MrAmnesia]

Hi guys currently on day 55 , its an 80 day strain called 'lennon'
Its been fine the whole way through up until now ...
Started off with the affected leaves going a lighter green then there eventually yellowing and some are going brown and dying
Originally i thought it was the signs to tell me to start the 2 week flush but im not convinced
Grown in soil
Been fed 3-4ml per litre bloom , 1ml calmag per litre
On its last feed 2 days ago i went 2ml grow 2ml bloom thinking maybe its a nitrogen deficiency , one of my other plants is starting the same sort of thing , 25% of fans have gone a lighter green lower/mid plants
The yellows worse at the bottom and its slowly making its way up

 

[oldcoot]

did you ckeck your trichs ?

 

[MrAmnesia]

Yes mate still all clear

 

[derek420colorado]

n problem either hungry or locked out due to pH being outta whack

 

[oldcoot]

yeah, sounds right.
that's a nice looking top in your hand too !

 

[MrAmnesia]

Mmm havent been ph'ing the water if im honest thought the soils ment to buffer it will give that ago , think out the tap it was 7.2 , if its an N defiency would ph water with a dose of grow be the way foward

 

[Yozhik]

I had yellowing leaves and/or what looked like a CalMag deficiency.
Turned out it was Nitrogen TOXICITY, that was causing a Cal/Mag lockout.

My ignorance and naivety was compounding the problem, because the CalMag supplement I was adding, was high in Nitrogen.
I suspect there was also a pH issue underlying the problem too.
The upper leaves, which didn't show the yellowing or mottling were a deep, deep darker green.

Not saying this is your issue - but might be food for thought?

 

[derek420colorado]

Mmm havent been ph'ing the water if im honest thought the soils ment to buffer it will give that ago , think out the tap it was 7.2 , if its an N defiency would ph water with a dose of grow be the way foward

Flush your pots with 3 times the volume of the pot with pH'd water only then on the last volume of water add half strength nutes. this should get everything back in order and it is a good idea to always pH your water. Always adjust pH AFTER adding your nutes.

 

[derek420colorado]

note: the leaves that are yellow are not going to turn back green