Can't figure out what this is and it's killing my plants.

My plants have been doing great in the flowering tent until the start of friday last week, all the fan leaves have been turning a lighter shade of green and alot of them are dying, curling up and becoming crispy, and nothing ive done has helped. I've tried adding a bit more potassium/phosphorous since thats what it kinda looked like to me, but still nothing changed.

Could this be TMV? I noticed a mosaic like pattern where the yellowing begins and theyve had some mosaic like leaves since veg. I posted about it on here before but everyone just started yelling at eachother about it and said I didn't have it, but to be honest thats the only thing I can think of that would be doing this. I started out with one clone that had that discoloring in the leaves, then the other 2 clones that were introduced next to this one started getting mosaic discolorations in there leaves once I put them in flowering.

nitrogen deficiency, also, where do you get your water from? And forget you ever heard TMV.

chuck estevez said:

nitrogen deficiency, also, where do you get your water from? And forget you ever heard TMV.

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I use distilled water. I added 1/4 strength veg nutes along with bloom starting on monday since I thought it was a nitrogen deficiency to (yellowing of leaves) but its still been spreading rampantly.

bbyb420 said:

I use distilled water. I added 1/4 strength veg nutes along with bloom starting on monday since I thought it was a nitrogen deficiency to (yellowing of leaves) but its still been spreading rampantly.

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this is your problem, if you use distilled, you need to supplement with cal/mag. I don't use distilled, I have never been a fan for using it in gardening.

chuck estevez said:

this is your problem, if you use distilled, you need to supplement with cal/mag. I don't use distilled, I have never been a fan for using it in gardening.

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Sorry, should've added that into the last post. I do supplement using 5 ml of cal/mag per watering.

bbyb420 said:

Sorry, should've added that into the last post. I do supplement using 5 ml of cal/mag per watering.

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try cutting that to every other watering and lose the distilled

Make sure it's not an iron deficiency or pH problem. Also, at that stage of flowering, the leaves are naturally going to start fading and falling off. The plant's only designed to last one season; it's programmed to die after it flowers.

If using soil its a good rule of thumb to feed with 10ml of CalMag or 15ml for coco...

Distilled water is really only helpful during germination and seedling stage so long as it is pH balanced for the plants needs.

I have to say Chuck is spot on... It is missing certain micro elements that is detrimental to growth

Bro, what are those little white and black dots in your first pic?

chuck estevez said:

try cutting that to every other watering and lose the distilled

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If not Distilled water then what's the best water to get...store bought that is?

Bthegreatone said:

If not Distilled water then what's the best water to get...store bought that is?

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probably spring water

Break the bank and Buy yourself an RO system to filter the water. If you were to use the water from your faucet is it city/municipal or well water?

Bthegreatone said:

If not Distilled water then what's the best water to get...store bought that is?

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ltecato said:

Make sure it's not an iron deficiency or pH problem. Also, at that stage of flowering, the leaves are naturally going to start fading and falling off. The plant's only designed to last one season; it's programmed to die after it flowers.

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sno capz said:

If using soil its a good rule of thumb to feed with 10ml of CalMag or 15ml for coco...

Distilled water is really only helpful during germination and seedling stage so long as it is pH balanced for the plants needs.

I have to say Chuck is spot on... It is missing certain micro elements that is detrimental to growth

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I made sure that my nutrient line (general organics) would have everything the plant needs. I've used distilled water since day 1 of growing and have never had any serious problems like this, if I were missing these critical "micro elements" why would it hit these 3 plants at this certain stage all at once?

ltecato said:

Make sure it's not an iron deficiency or pH problem. Also, at that stage of flowering, the leaves are naturally going to start fading and falling off. The plant's only designed to last one season; it's programmed to die after it flowers.

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PH has always been 6.5, I thought about that fade too but this seems to be much more aggressive than any fade I've ever seen.

sno capz said:

Break the bank and Buy yourself an RO system to filter the water. If you were to use the water from your faucet is it city/municipal or well water?

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I have city water, haven't tried to use it yet. I'm on my first grow with two autos. I been using Distilled water for the last month but I know I've had a ph problem but no tester

Bthegreatone said:

I have city water, haven't tried to use it yet. I'm on my first grow with two autos. I been using Distilled water for the last month but I know I've had a ph problem but no tester

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First guess would be Iron! With out it it doesn't matter how much nutes you put in things like k won't work unless it's working....also check your runoff water...u said u have been using 6.5, if it goes past 7.3-7.8 your iron will become unavailable, look for eddha in the future as it is 100% available up to 10 ph! I'd also suspect zinc def since your plant is looking like it has no N and your using N! One of the biggest mistakes I have seen on here is people using distilled and or RO water! Look up your city's water it might have everything you've been missing! Just let it sit out for a day...in sunlight if you can!

Only bad thing about city water is that it has chlorine and detergents...i use h2o2 26% (hydrogen peroxide) this helps get it gas out.

Hey guys, first time grower here.....i and i cant figure out whats killing my plants, i transplanted them out side about 2 weeks ago, and gave them a good fertilization before i have to go away. When i came back from a heavy heavy weekend of rain....this is what my plants looked like....... did i give them too much fertilizer or to much water?

bbyb420 said:

Could this be TMV?

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It certainly looks like it could be. TMV is a fairly common cannabis problem. Do you use tobacco or tobacco products around your plants?

bbyb420 said:

I made sure that my nutrient line (general organics) would have everything the plant needs. I've used distilled water since day 1 of growing and have never had any serious problems like this, if I were missing these critical "micro elements" why would it hit these 3 plants at this certain stage all at once?

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The nutrient line you use should have sufficient cal/mag in it. It's not the water you use and I don't think It's a cal/mag deficiency either, the coloration is wrong for that.. it looks more like a pH lockout than anything else.

Guy2HIGH said:

It certainly looks like it could be. TMV is a fairly common cannabis problem. Do you use tobacco or tobacco products around your plants?


The nutrient line you use should have sufficient cal/mag in it. It's not the water you use and I don't think It's a cal/mag deficiency either, the coloration is wrong for that.. it looks more like a pH lockout than anything else.

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TMV DOES NOT HAPPEN IN MARIJUANA, IT ISN"T POSSIBLE, PLEASE DON"T TELL BULLSHIT LIES.

ltecato said:

Make sure it's not an iron deficiency or pH problem. Also, at that stage of flowering, the leaves are naturally going to start fading and falling off. The plant's only designed to last one season; it's programmed to die after it flowers.

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No it is not natural for a cannabis plant to yellow and loose fan leaves during production. Pure forum crap. Most likely as already mentioned the plant is N deficient due to an unbalanced diet full of an over abundance of P and K.