Black leaves

Bigjeff420

Active Member

Dec 26, 2020

• #1

My leaves r turning black at the tips and r really brittle I keep a good watering schedule I’m in week 7 flowering

 

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Beehive

Well-Known Member

Dec 26, 2020

• #2

What's the PPM of your fert solution?

It looks like you're running them hot on ferts.


And that's not black. Its purple. Genetics or the leaf surface temperatures are on the colder side. LST should be between 74.5°F up to 81.5°F. About 60%-50% humidity.

 

MY OWN DANK

Well-Known Member

Dec 26, 2020

• #3

Purple...black...fall colors also...are colors the plant will fade through nearing the end

 

Bigjeff420

Active Member

Dec 26, 2020

• #4

K yeah I’m thinking nut burn but I had a thirp problem but I don’t think they do that damage my leaves r dieing but only on the tops closest to the light could it be the light intensity my ppm is hot at7.4 /7.6

 

Beehive

Well-Known Member

Dec 26, 2020

• #5

Lux meter. 47k lux. 600-750 ppm. 5.7-6.2.

Lots of hung up fly paper. AzaMax is you want. Cut the fly paper into 4" sections. Lay them around the base of the plant. Change them out every 4-5 days.

 

Bigjeff420

Active Member

Dec 26, 2020

• #6

Cool ty I’ll do that

 

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JoeBlow5823

Well-Known Member

Dec 26, 2020

• #7

Black leaves matter.