Leaf problem

[James-Bong]

got this on a couple of my Arcata's and one of my K2's..... Any Ideas?

 

[Organic Hydro]

When i see something like that, my first thought is PH, but without you providing any details, that's as good i could guess.

How about some more info man ?

Peace

 

[James-Bong]

Soil Ocean forrest/perlite 70/30 mix

PBP nutes, Cal mag.

Ro Water- Ph of 6-6.5

 

[Organic Hydro]

After you add your nutes & cal-mag to the water it tests out at 6 - 6.5 ?
and are you leaching about 10 - 20 % of the water you add as runoff ?
might wanna get a soil PH meter if you dont have one already and adding some dolomite limestone to your mix is a good idea too.

 

[resinryder]

Maybe an iron def. Try some iron star from biotanicare.

 

[Guest]

Mag lock out caused by PH problem.

(Pic borrowed directly from the Sick Plant Guide by mynamestitch for illustration purposes only). See the Guide for symptoms and corrective measures.

 

[Capt. Crip]

The problem is fixed

The problem is fixed

You will notice the dark green coming back into the leaves.The damage is irreversible but the undamaged portion will grow normally.It's mag. Potassium or iron and probably happened because of a PH fluxuation.Most fertilizers contain enough of these nutes to provide a balanced diet for cannabis but if the PH drifts many will be locked up and unavailible to the plant.
Usually a good dose of PH adjusted water with a normal dose of your favorite fertilizer will clear that type of problem right up.
Take care and I hope all goes well with the rest of your grow.......................CC

If you would use something like GH Flora Nova 1 part nutrient mix every 2nd or 3rd feeding they would stay dark green throughout the whole grow cycle.It has everything to keep them growing perfectly and they pretty much grow themselves with this wonderful fertilizer.
I understand if you have your preferred nute mix,I just thought it worth a mention with the weay it grows our favorite plant.
Take care........