light yellowing in between veins

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bumanuzber2010

Member
View attachment 2414904 if the stem and veins are a nice green color and so are the tips of the leaves but there is light yellowing in between the veins, what does that mean? and the problem is really only occuring when they are mature fan leaves. Ive looked at nutrient def. and burn and ph problems, bug infestations, heat stress, pretty much everything and none of them look anything like this because the leaves appear healthy and arent curling at the ends or getting golden tips(bottom looks more gold because of glare from a hps) but pic was taken in Cfl
 
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bumanuzber2010

Member
well the last time i fed them with fox farm big bloom 2 tbls per gallon when they were a week old like the chart said(and did the next day without nuts and then water the next day etc) but not too long after they started looking like this although it did appear to grow a lot better after i fed it for the 3 times i did feed it. It only developes on the larger leaves, i didnt know exactly what was happening so i went back to regular (distilled)water and it seemed to help for a little bit, its in miracle grow potting soil that already feeds the plants for a month or so,but i plan to change to fox farm when i transplant, they are feminized autoflowers they are 18 days old from seed and are under a 400 hps thats about 3 feet or so away. I have a carbon blower pulling air from the grow area an intake fan aswell as a fan circulating the air in the area to slightly move the plants so they have good circulation but not too much to cause wind burn. if theres anything else you need just ask
 
PSUAGRO.

PSUAGRO.

Well-Known Member
Chuck's right on^^^ fox farm nutes have very little cal/mag and so does the MG soil........make sure your ph is between 6-7 first and then add lime/cal-mag/ whatever
 
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bumanuzber2010

Member
PSUAGRO. said:
Chuck's right on^^^ fox farm nutes have very little cal/mag and so does the MG soil........make sure your ph is between 6-7 first and then add lime/cal-mag/ whatever
Click to expand...
So should i just use unchlorinated tap water( let it sit out for 24 hours)? and that would explain the change after i added nutes, but where can i get cal-mag because i would add the lime when i transplant them into their final container, and also what should i use to test the ph, just simple ph strips? because ive heard that some of the ph soil testers out there are just total POS's
 
Ringsixty

Ringsixty

Well-Known Member
bumanuzber2010 said:
So should i just use unchlorinated tap water( let it sit out for 24 hours)? and that would explain the change after i added nutes, but where can i get cal-mag because i would add the lime when i transplant them into their final container, and also what should i use to test the ph, just simple ph strips? because ive heard that some of the ph soil testers out there are just total POS's
Click to expand...
What is your soil Ph?
 
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bumanuzber2010

Member
Ringsixty said:
What is your soil Ph?
Click to expand...
thats the thing im not exactly sure yet because i dont have a ph meter/ test kit, but i plan to get one tmro and whatever i can use to stop the cal/mag deficiency. I stopped feeding it entirely but im assuming the nutrients were doing nothing but helping, i have two 1 gallon containers that i got distilled water from walmart and i had 1 with 2 tbls of the big bloom and then a regular water container to do flushes, i want to know what i should do for water and if i just keep following the feeding schedule for fox farm if it will help it? if not what are some calcium-magnesium supplements?
 
keep it real.

keep it real.

Well-Known Member
you said you feed and then watered the next day and then feed again the next day thats your problem over watered will cause water logged soil and cause your ph to become an issue, don't water everyday does it rain everyday no. water very well one time let her dry well and repeat.
 
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