Help please, what is this?

[Cavsoulja]

alright I've searched everything and everywhere, and I cannot find a picture or a symptom that exactly matches what I have going on. If anyone can tell me what this is it would be greatly appreciated. I'm in week 5 of flower and these brown spots / leaf yellowing are taking over. At this rate I won't have any foliage left at harvest. I'm growing in fox farm soil with fox farm nutes. They are getting ph adjusted RO water. This is my last ditch effort to save this crop. I have flushed, I have stopped with the nutes because people said it was nute burn, didn't help.

 

[Final Phase]

Somethings messed up, but from the looks of your plants being at week 5 of flowering, you will have enough leaves to finish. Most problems equate to loss of yield and or potency... Your mission at this point it to get to the finish line. Avoid overcorrecting, good luck!

 

[JackSkell]

For starters i would give some cal-mag in your next feeding, also go back to feeding.. if your not giving your plant nutes its going to start using parts of itself as a nutrient source which could be a small part of what your already seeing (im not saying over feed, just go back to regular or even a more diluted mixture). i would also just go ahead and pinch/cut off most of the affected leaves, i promise a little defoltiation in flower wont hurt, infact it quite often causes massive bud growth, certain strains i defoliate every 2 weeks because they just love it and makes them bud like crazy.

 

[Cavsoulja]

Somethings messed up, but from the looks of your plants being at week 5 of flowering, you will have enough leaves to finish. Most problems equate to loss of yield and or potency... Your mission at this point it to get to the finish line. Avoid overcorrecting, good luck!

That might be the best advice I have gotten this far. Thanks man. And honestly I don't think yield or potency are suffering much. Seriously bud development has not slowed and these things are FROSTY.

 

[Krippled]

alright I've searched everything and everywhere, and I cannot find a picture or a symptom that exactly matches what I have going on. If anyone can tell me what this is it would be greatly appreciated. I'm in week 5 of flower and these brown spots / leaf yellowing are taking over. At this rate I won't have any foliage left at harvest. I'm growing in fox farm soil with fox farm nutes. They are getting ph adjusted RO water. This is my last ditch effort to save this crop. I have flushed, I have stopped with the nutes because people said it was nute burn, didn't help.

When was your PH meter calibrated??

 

[Cavsoulja]

When was your PH meter calibrated??[/QUOTEi

When was your PH meter calibrated??

ots brand new, got it like a month ago and calibrated it when I got it

 

[roseypeach]

I agree with the poster that suggested adding cal mag, that's definitely a deficiency problem. I wouldn't defoliate though, even the bad leaves still have the ability to carry light and nutrients that the plant needs.

 

[Cavsoulja]

I agree with the poster that suggested adding cal mag, that's definitely a deficiency problem. I wouldn't defoliate though, even the bad leaves still have the ability to carry light and nutrients that the plant needs.

Cal mag it is then. Every time i water?

 

[roseypeach]

Cal mag it is then. Every time i water?

What is your nute schedule and are you growing in soil or hydro? I could be amiss on the cal/mag as it shows signs of necrosis on the single leaf you posted.

 

[Cavsoulja]

What is your nute schedule and are you growing in soil or hydro? I could be amiss on the cal/mag as it shows signs of necrosis on the single leaf you posted.

I'm growing in fox farm soil. I'm feeding the fox farm trio and following the feeding schedule they provided. I feed every other time I water. Usually water every 3 days or so, when the soil is dry.

 

[roseypeach]

I'm growing in fox farm soil. I'm feeding the fox farm trio and following the feeding schedule they provided. I feed every other time I water. Usually water every 3 days or so, when the soil is dry.

most likely what you have there is burn. Fox farms runs a bit hot, I'd recommend on your next grow cutting the mix with some regular potting soil. The newer leaves look okay, see the dark green? I'd use nothing but water until the leaves start to pale a bit

 

[KryptoBud]

Looks like you may have some powdery mildew. The white spots 1st pic bottom left hand corner

 

[Cavsoulja]

Looks like you may have some powdery mildew. The white spots 1st pic bottom left hand corner

Yeah I definitely do. Been fighting it this whole grow. Pain in my ass. I have it in check pretty good, just have to spray all the time and hope. Think the two issues could be related?

 

[roseypeach]

Powdery mildew mainly affects photosynthesis. I've used baking soda in my outdoor vegetable garden with success so I googled to see if it would do as well for cannabis. Take a look... http://www.cannabis.info/us/abc/30002243-how-to-use-baking-soda-in-your-cannabis-garden