Mottled yellow/brown leaves - Molybdenum deficiency? Pic included.

[amsterdam2015]

Hi everyone,

I am in just finishing week 3 of flowering, all perlite hempy buckets, under a 600w hps.
Using FNB (tweaked Lucas formula) with PK13/14 and Rhizotonic sometimes

Is this a deficiency? Or is it a sign of over fert?

They heaviest feeders, have taken 950ppm, while the other 2 plants have been given 250-400ppm for the last 3 feedings as they were CLAWING on the new growth (sure over-fert)

Yet all the plants are affected by this, all seem to display it.


Any help or suggestions or ideas at all would be more than welcome, to give me a starting point..

Cheers!

 

[delvite]

Hi everyone,

I am in just finishing week 3 of flowering, all perlite hempy buckets, under a 600w hps.
Using FNB (tweaked Lucas formula) with PK13/14 and Rhizotonic sometimes

Is this a deficiency? Or is it a sign of over fert?

They heaviest feeders, have taken 950ppm, while the other 2 plants have been given 250-400ppm for the last 3 feedings as they were CLAWING on the new growth (sure over-fert)

Yet all the plants are affected by this, all seem to display it.


Any help or suggestions or ideas at all would be more than welcome, to give me a starting point..

Cheers!

View attachment 2601720

it could be that your supposed to be using boost instead of pk? boost prepares the the plant for higher pk uptake, pk 13/14 is supposed to be used a few weeks before harvest to fatten them up just a thought but read up on this ........................................


EVEN HIGHER YIELDS USING PK 13/14
BOOST is not feeding off itself but an additive that increases the plant's photosynthesis. This is because PK 13/14 provides the plant with extra flowering elements while BOOST ensures that the plant has the energy to be able to utilize these elements.

 

[amsterdam2015]

Cheers dude

I did read up quite a bit before using the PK, and decided to use it from week 3 - 6 at a lower dosage, i've read a few journals of people doing this with success.

But this issue with the leaves was there before using the PK, and actually happened on my first grow too..

It might not be anything to worry about, but I prefer lush green to that brown/purple/yellowing thats happening..


Thanks for the comments

 

[amsterdam2015]

also looking into getting the boost, will have to reserve it for the next run, but i like the sound of how those products work, and think im about ready to try something that powerful/stimulating

 

[amsterdam2015]

Anyone else got any suggestions please?

I would like to rule out nitrogen deficiency, and even if it is, I really dont mind it.

There must be someone who has seen this colouring on the leaves before and can lend me a helping hand?

I have been and looked at the leaf charts but find it impossible to match up so looking for some real life experience PLEASE!

Cheers..

 

[amsterdam2015]

Why is it that nobody on any of the forums, apart from World of Hempy, offers up any advice?

Meaning no offense to the fella who has tried to help, but cant anyone suggest anything??

Come on guys, I try and help where I can and I am inexperienced, surely someone with some know how could help me no end in a few seconds...

 

[MileHigh1]

I think you need some better pics of the leaves you may get some better responses.
But from what I can see of them it almost looks like maybe a sulfur deficiency.

 

[amsterdam2015]

for anyone else who has similar problems, I now think its a PH issue (too low) and am raising it to 6.0.

will keep this thread updated; joy!