Not sure whats wrong... magnesium??

[built2last]

Hello everyone-

I have 4-ak47s growing everything seems to be going well. It will be 2 weeks flowering on saturday and I have noticed two leaves on one of the plants and am unsure what could be wrong. I just top feed some peace of mind fruit and flower two days ago and am using the moonshine mix. Ph is good, temps are good, i'm thinking its magnesium but wanted to get a second opinion.

 

[Mr. Hugeblunts]

It may be magnesium but IME Mg deficiency more gradually yellows starting from the outside of the leaf.

What you are seeing (the yellow) are the beginning of necrotic patches. Soon they will turn brown.

 

[rocket high]

im on week 2 of flowering and this has started happening .....any ideas

 

[rocket high]

its original nothern lights by the way in hydroponics temp are fine and humidity...

 

[built2last]

looks like what i'm dealing with rocket high. Not sure. What do you think could cause that hugeblunts?

 

[Hazy Lady]

I would re-check your PH, that looks like the start of Mag/Cal def from low/high PH, you too rocket'. If PH is OK then just give Cal/Mag .

 

[rocket high]

thanks hazy need to go to the grow shop and gt some cal-mag and re check my ph will it get worse with the boost that am going to add in week 3 ? :*

 

[Hazy Lady]

You are very welcome Rocket. I think Boost very very slightly lowers PH as most nute's do but not so much you need to add PH up or anything, it's a tiny amount of Boost per gallon.

 

[Mr. Hugeblunts]

im on week 2 of flowering and this has started happening .....any ideas

This looks more like a mag deficiency

 

[rocket high]

cheers hugeblunts am glad you's guys are here coz i have had all different advice from my grow friends ...

 

[built2last]

shouldn't i be fine with cal/mag if using tap water?

 

[rocket high]

you cant see it from the pic but the leafs are not shiney they look dull ..is that the mag deficiency too... :N

 

[Mr. Hugeblunts]

Eh, if you want them shiny, give them a foliar bath with neem oil.

 

[Hazy Lady]

If you want them to have shiny leaves - naturally - cure the Mag problem, some tap water has enough Cal in for certain strains but the rest need extra.

 

[rocket high]

ohhh my tap water is very soft being in scotland .the water is excellent tho but not a lot of minerals in it..... will use cal-mag as soon as possible

 

[noreaga]

ph flux + N, get both in check it cant hurt. good luck i think she wont be too stressed

 

[rocket high]

a will keep you guys updated on the prob ..lights come on at 8 gmt ...so i will have a look at them and update

 

[rocket high]

well checked the ph and its fine 6.0 so it must be cal-mag thats the problem will fix soon

 

[built2last]

hey rocket

ph should be higher 6.5-7.0. mine has got to be a deficiency my ph is around 6.8.

 

[built2last]

sorry rocket i thought you were in soil