Help identifying cause of yellow or light green marks on leafs

teddy bonkers

Well-Known Member
you might get some people tell you it's Tobacco mosaic virus, but that doesn't happen in cannabis. it almost looks like a mg deficiency. but I don't see any brown spots. There are 2 other things that cause that. genetics or broad/russet mites. Get a 60x mag/scope and look for tiny mites. also, what p.h are you using and have you calibrated your meter lately? are you using distilled water?
 

southbayLA154

Well-Known Member
you might get some people tell you it's Tobacco mosaic virus, but that doesn't happen in cannabis. it almost looks like a mg deficiency. but I don't see any brown spots. There are 2 other things that cause that. genetics or broad/russet mites. Get a 60x mag/scope and look for tiny mites. also, what p.h are you using and have you calibrated your meter lately? are you using distilled water?
6.5-6.7 ph yeah I’m using distilled water .. ph meter is brand new says it come Pre calibrated But I’ll recal. Tomorrow .. I don’t think it’s the ph cause I have another 2 plants that are a week younger and get the same water and they look perfectly healthy .. Maybe either mg deficiency or bugs ?
 

SheeshM

Well-Known Member
Looks like it may be bugs to me too. Those white specs may mean nasty pests under your leaves.
 

CannaCountry

Well-Known Member
Your pH is off...and bugs.

Any way for you to test your soil pH? I'd recheck your probe just to be sure it's calibrated as well. Good luck.
 

teddy bonkers

Well-Known Member
i've seen distilled water cause people so many problems over the years, especially just using it with no nutes.

My theory is that nutrients work on pos and neg ions and they are happy when everything is right. but continually dumping DE-IONIZED water on them, the distilled water will strip away certain nutes, mainly mag and cal to re ionize.
 

southbayLA154

Well-Known Member
i've seen distilled water cause people so many problems over the years, especially just using it with no nutes.

My theory is that nutrients work on pos and neg ions and they are happy when everything is right. but continually dumping DE-IONIZED water on them, the distilled water will strip away certain nutes, mainly mag and cal to re ionize.
What type of water would u recommend using ? Thanks for the help btw
 

teddy bonkers

Well-Known Member
What type of water would u recommend using ? Thanks for the help btw
I use r/o water because I like to be the one who adds stuff to it. r/o plus the cal/mag in the nutes I use is enough. Are you wanting to stay organic?
First, you probably need to re amend your soil. if your going to use nutes, Now would be a good time to feed them.
 

southbayLA154

Well-Known Member
Your pH is off...and bugs.

Any way for you to test your soil pH? I'd recheck your probe just to be sure it's calibrated as well. Good luck.
I use r/o water because I like to be the one who adds stuff to it. r/o plus the cal/mag in the nutes I use is enough. Are you wanting to stay organic?
First, you probably need to re amend your soil. if your going to use nutes, Now would be a good time to feed them.
well I wanted too use the mills nutrient line , at the start of flowering and begin with light feedings so

r/o water with mills nutrient line at the start of flowering with light feedings to begin with. Would this be okay?
 

teddy bonkers

Well-Known Member
well I wanted too use the mills nutrient line , at the start of flowering and begin with light feedings so

r/o water with mills nutrient line at the start of flowering with light feedings to begin with. Would this be okay?
if you can get them some cal/mag with 2% N, that would help them. I would personally give them a good feeding of something like foliage pro from dyna gro
 

southbayLA154

Well-Known Member
Yeah ima go too my local hydro store later today too get the cal mag fersure I’ll keep an eye out for the dyna .

what do u think about starting the mills nutes with light feedings to get thm started off with?
 
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teddy bonkers

Well-Known Member
Yeah ima go too my local hydro store later today too get the cal mag fersure I’ll keep an eye out for the dyna .

what do u think about starting the mills nutes with light feedings to get thm started off with?
All I know is their logo, mills pays the bills.lol As long as you get them a good feeding of base veg nutes, they should recover nicely.
 

southbayLA154

Well-Known Member
it was a combination of spider mites and just using distilled water , after i took care of the mites and started feeding nutes they seem too be turining back into 1 solid shade of green.. id say it was more the distilled water withn no nutes. but of course i took care of the mites also
 
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