Leaf Issues Help!

First off, I know I need to post pics but the wife is out of town w/ the camera and if I cant get this figured out I will try and post pics later next week.

Anyway- I have 2 ak-48, and 2 Island sweet skunks i got from a dispensary about 6 days ago as fully rooted clones. Ak's in soil solo cup & ISS's in 3" rockwool cubes. I transplanted 2 days after I got them into 3 1/2g buckets w/ a mix of 2/3 ffof & 1/3 perlite. Left plants on edge of light for lower light for 2 days then put the lights about 8" above plants. Plants seemed healthy before transplant, about 12" tall. Now, I think we watered the soil a bit too much at transplant but fed no nutes as i heard ffof has plenty (maybe too much when plants are stressed)? Temps between 70-80 degrees and humidity about 50%.

These symptoms started about 3-4 days ago: First thing i noticed was that the leaf tips (not margins) were turning yellow with small brown tips throughout plant. Then as the tip browning started getting worse i noticed small brown spots (mostly up high but spreading throughout plant) turning up. Next thing i know the lower fan leaves start turning yellow (kinda uniformly) from tips down the leaf and the top fan leaves tips were curling up like brown rams horns & those leaves had most of the brown spots. I havent had time to check ph runoff yet as i have only watered at transplant and soil still too wet to water.

So, i guess my questions would be: Do you think it sounds like Mag def/ nutrient burn from the ffof being to hot and that i stressed them pretty good at transplant which makes them vulerable? Lights too close at 8"?-those t5's are pretty hot

Any suggestions would be appreciated-Thank you all

crawdadd3 said:

First off, I know I need to post pics but the wife is out of town w/ the camera and if I cant get this figured out I will try and post pics later next week.

Anyway- I have 2 ak-48, and 2 Island sweet skunks i got from a dispensary about 6 days ago as fully rooted clones. Ak's in soil solo cup & ISS's in 3" rockwool cubes. I transplanted 2 days after I got them into 3 1/2g buckets w/ a mix of 2/3 ffof & 1/3 perlite. Left plants on edge of light for lower light for 2 days then put the lights about 8" above plants. Plants seemed healthy before transplant, about 12" tall. Now, I think we watered the soil a bit too much at transplant but fed no nutes as i heard ffof has plenty (maybe too much when plants are stressed)? Temps between 70-80 degrees and humidity about 50%.

These symptoms started about 3-4 days ago: First thing i noticed was that the leaf tips (not margins) were turning yellow with small brown tips throughout plant. Then as the tip browning started getting worse i noticed small brown spots (mostly up high but spreading throughout plant) turning up. Next thing i know the lower fan leaves start turning yellow (kinda uniformly) from tips down the leaf and the top fan leaves tips were curling up like brown rams horns & those leaves had most of the brown spots. I havent had time to check ph runoff yet as i have only watered at transplant and soil still too wet to water.

So, i guess my questions would be: Do you think it sounds like Mag def/ nutrient burn from the ffof being to hot and that i stressed them pretty good at transplant which makes them vulerable? Lights too close at 8"?-those t5's are pretty hot

Any suggestions would be appreciated-Thank you all

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Before you go chasing "mystery" nute burn and or deficiencies, check out this article: https://www.icmag.com/ic/showthread.php?t=159960, as it might save you the headache, time, and resources I wasted on the same issue. I had the exact same "nute burn" and or "deficiencies" you describe, interveinal chlorosis, yellowing, and brown spots you are describing, but thankfully we live in the information age and my local growstore directed me to this article that answered all of my "mystery" problems in one answer. Fungus gnats are extremely prevalent in high quality organic soils right now, that time of year i guess. I got them in my roots organic aurora mix and I have also talked to several other caregivers experiencing the same issue with ffof, but I have been treating them with gnatrol and Diatamaceous earth like many other caregivers, I'm also about to get some predatory nematodes. Be careful not to confuse fungus gnats with root aphids though, as both look similar. The link above is chaulk-full of spectacular info on the subject though and will help you distinguish between the two. A good way to check if you have them (if you are not seeing any flying ones they might be hiding out in your soil, nasty bastards!) is to place a slice of potatoe about an inch, give or take, into the top layer of your soil and wait about twenty four hours. After waiting, check to see if larvae have accumulated on the potatoe. Hope this might help! Happy Growin!
Oh, by the way, 50% humidity is a bit high, 40% humidity and 80 degrees faranheit is optimal conditions for cannabis.

Thanks a bunch! I will check out that link right now.

I checked that link which was very informative but after inspecting the soil and leaves i did not see any bugs period. That leads me to believe its something else like nutes or stress and too wet of soil or all of the above. Any other ideas?

crawdadd3 said:

I checked that link which was very informative but after inspecting the soil and leaves i did not see any bugs period. That leads me to believe its something else like nutes or stress and too wet of soil or all of the above. Any other ideas?

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Since the symptoms are uniform throughout two different strains (correct?), one indica and one sativa, and since symptoms have appeared just recently, it is definitely something new the plants were exposed to. No nutes, only the soil and water, right? I would still suggest to do the potatoe trick to check for larvae that sometimes may be to small for the human eye to spot. As well you say you keep your soil pretty moist, that is optimal conditions for fungus gnats(damp soils provides plenty of fungus on roots for them to feed on). You should let your soil dry out as much as the plants will tolerate and I would also be ph'ing my water pretty low since they're vegging. What kind of water are you using? https://www.rollitup.org/organics/426739-fox-farms-joins-roots-organic.html, wanted to show you that too, sad but true, I'm hearing it from everyone.

SS is on to something here, it's definitely something that you're providing to the plants that is causing this, but I can't think of what it is.

Your soil, light, and temps are optimal so I'm thinking maybe your plants are getting heat damage? Do you have a fan blowing across the light? Also could be a mold, or something in your water (I'm no fan of tap, spring, or well water, they all poison yer plants and "letting x evaporate" is horseshit)

Try giving them distilled water, and get some kind of magnification device so you can look closely at what's happening to your leaves. IDK, I just like to know for sure what the problem is with my plants before buying a product to fix them. I've got a shelf full of products that I never use anymore... mite-x, cal-max, superthrive, neem oil, no-pest strips, various sulfer-based fungus sprays, etc.

Post some pics when you can.

Xcon said:

SS is on to something here, it's definitely something that you're providing to the plants that is causing this, but I can't think of what it is.

Your soil, light, and temps are optimal so I'm thinking maybe your plants are getting heat damage? Do you have a fan blowing across the light? Also could be a mold, or something in your water (I'm no fan of tap, spring, or well water, they all poison yer plants and "letting x evaporate" is horseshit)

Try giving them distilled water, and get some kind of magnification device so you can look closely at what's happening to your leaves. IDK, I just like to know for sure what the problem is with my plants before buying a product to fix them. I've got a shelf full of products that I never use anymore... mite-x, cal-max, superthrive, neem oil, no-pest strips, various sulfer-based fungus sprays, etc.

Post some pics when you can.

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LOL, nothing like spending unessecary moneys in these harsh economic times. 50% humidity is definitely breeding grounds for mold. If you go online to your local governments website they may have a chart that tells you the ph and ppm of your tap water, but that depends on where you live. I live in Colorado Springs and our ppm is around 50 and our ph is around 7.5 before ph'ing, but that is some of the best tap water you'll find in the country.

it sounds like a calcium def maybe mag as well?

Can you provide pictures? It will be easier to tell.

So...these plants are how old right now? and how tall are they? And this is affecting the whole plant from top to bottom?

Are your leaves curled down and kinda in on themselves?

Like a claw or a parrots beak?