what deficiency is it

**responsed** · 03-02-18, 05:40 PM

Welcome
I have a problem with my leaves on mid stage of flow - as on pictures. These are moby dick XXL's on coco. Nutrients are Dutchpro A+B and Advanced nutrients additives - cal/mag bud candy big bud etc. as in AN chart is specifie.
Im using RO wather, ph 5.9-6.0. It looks a bit like Mg deficiency due to Ca overdose but im not sure and dont want to do any more harm.

Am i right with Mg deficiency?

cheers

**Bud Lightyear** · 03-02-18, 05:57 PM

How much cal-mag have you added ? How frequently and how are you administering it ? Oh and welcome to the Talk mate...

Regards BL

**Ironman** · 03-02-18, 05:58 PM

How comes you had a cal overdose?
Looks like cal def to me. Mag def would show yellow before blotching. Take a look at the chart.

You popped in my diary earlier. My plants have just suffered mag def, check out my pics. Here's a little chart to work to.😉

Sent from, Thames Iron Works.

**responsed** · 03-02-18, 06:11 PM

i am familiar with this chart, yet still i cant diagnose it - but if i would have to choose i would pick p/k deficiency ;p
Im wathering every 1-2 days - easy ... i have 16L pots. nutrients mostly like its written in feeding charts. A litle more of the base nutrient becouse of the leaves colour
The cause why i am thinking obout Ca overdose is becouse adding dolomite which i could add too much, and i red that it could block Mg resorption.

although in the mid stage of flo (4-5 week) it could happen
btw: thanks for welcome, i didnt introduce my self since its not exactly legal in my country :P

edit:

Originally Posted by ironman

You popped in my diary earlier. My plants have just suffered mag def, check out my pics. Here's a little chart to work to.😉

Yeah i know ... just i have a Ca overdose that blocks Mg at mind still in my case

**joker_the_smoker** · 03-02-18, 06:36 PM

No need to add dolomite in your coco at all.not once have i or will i do that. I jus use calmag as a foliar spray in veg an very early flower. Then jus the occasional calmag in the feed through flower.

**responsed** · 03-02-18, 06:50 PM

im using folar spray as well, but im not feeling it when by buds are formed cause of the molds. From all my actions i feel like i could add too much Cal/Mag. Looking at the Ca and Mg concentration in Cal/Mag and dolomite the only thing i can think of is Mg deficiency as mentioned. But from all things ... im lacking of recognising the deficiencies , thats why i need help from a veteran in this case