Nute burn or Potassium deficiency? Or something else?

Adr19n

Member

Aug 10, 2016

• #1

DWC going on 6 weeks of flowering. Using Botanicare Pure Blend Bloom, LK, silica blast, and Botanicare sweet. Ph stays between 5.6-6.0. Temp between 75 and 80F. Humidity around 50%. Only lower leaves are affected. TDS around 1150. Here are some pics of the affected leaves, buds on plant, and a pic of affected area. Thanks for any input!

 

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Uberknot

Well-Known Member

Aug 11, 2016

• #2

So is that only on the bottom leaves? Or is it spreading all over the plant?

Reminds me of fungus/mildew damage almost, but I have no idea atm.

The tops don't look burnt or anything and it's around the tips and edges of the leaves.

I am sure someone who has more knowledge will pipe in soon enough.

 

Adr19n

Member

Aug 11, 2016

• #3

Its more on the bottom leaves kinda spreading up to the upper ones.

 

Adr19n

Member

Aug 11, 2016

• #4

so i looked at the damaged leaves under a 60x loupe and i can see like really tiny white spheres/dots like where the damage is furthest from the tips. (almost like they are making their way to the stem because the browning appears first at the tips and makes its way to the stem along the edges.) couldnt get a picture but is that some type of fungus/mildew?

 

Last edited: Aug 11, 2016

Adr19n

Member

Aug 11, 2016

• #5

More damaged leaves i just cut. They start on the bottom leaves but slowly moving its way up the plant.

 

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outlier

Well-Known Member

Aug 11, 2016

• #6

Check for aphids too mate. That looks similar to what happens when those little pricks leave honeydew everywhere.

 

Adr19n

Member

Aug 11, 2016

• #7

I dont seem to see any at the moment. i looked all up and down and underneath the leaves. but no bugs. is there anything else that can cause this necrosis at the tips and edges with the leaves still dark green??

 

AnimalMother1974

Active Member

Aug 12, 2016

• #8

Mabey excess nitrogen is blocking the potassium

 

Adr19n

Member

Aug 12, 2016

• #9

That might be possible because a little botanicare pure blend grow was added with the pbpbloom because leaves were yellowing up a little too early.

 

Psyphish

Well-Known Member

Aug 13, 2016

• #10

Root Aphids? You wouldn't necessarily see anything other than a slightly sick plant that drops leaves.

 

Adr19n

Member

Aug 15, 2016

• #11

Im at a loss lol. I guess just let it go a little longer. They should be almost ready for harvest within couple weeks