Having a issue that I can't identify. Please Help!

[krinen]

So I have one strain that seems to be doing this every time about 3 weeks out from harvest. All of the fan leaves turn this color. Not sure what is going on, if it is just the strain or something environmental etc....


Growing in 70/30 coco/perlite, EC is 1.36 in a DTW top feed system. Just triple checked the PH staying right at 5.9. Feeding Jack's Professional Hydro Feed, with Dynagro Bloom for added P-K.

Please help me!

 

[Nes]

What strain?
Do you have pictures of the plants?
Is it affecting you success?
Flowering indoor mimics fall and I've seen leaves change all sorts of colors late in flower.

 

[Crooked8]

Are pests present?

 

[krinen]

I have been battling some spider mites. They are pretty much gone now. Unsure of the strain, was a clone strain given to me by a friend. I will try to get some pics of the plant tonight.

 

[Crooked8]

The mites are the issue imo

 

[krinen]

Ok here are some more pics. Don't mind the top of the plant. It got cooked earlier in flower :-(. The breaker for my AC and exhaust fans popped. That has been rectified.

 

[Nes]

I'm guessing thats just the strain. I've seen similar color changes at the end of flower

 

[krinen]

I'm guessing thats just the strain. I've seen similar color changes at the end of flower

That's what I was thinking. Seemed odd that it was only occuring on that strain

 

[DoubleDDsNuggs]

I think so too. you could try increasing the PK boost next round. Here's what a plant looks like when it's changing colors

 

[epicorchard]

Normal color change. I'm guessing they get cool night temps? Cool temps bring out unusual color changes. I've noticed kush and disel genetics often throw some brilliant red and purple hues.

 

[krinen]

Weird thing is it only gets down to maybe 70 in there at night with the dehumidifier running.

 

[DoubleDDsNuggs]

some don't need a temp change to increase purple leaves. some just do it on their own. that one I had did. as it neared harvest the buds even started getting some purple in them. sugar leaves were a very pretty medium purple and then fans turned that magenta red orange colors even more.