Leaf diagnosis request - burn or deficiency?

sandman83 · Dec 27, 2019

Like the title states, plants are larger than I planned and might be rootbound in the 2 gal flo and gro. New system to me and been very long time so just looking for a 2nd pair of eyes. week 5 of flower, lower leaves started to yellow slightly but I left it as I didn't want to increase N at this point. Started noticing brown spotting on one girl, she is the lankiest and stretched the most, seems to use the most nutes. One other is a similar pheno and is starting to show similar symptoms.

GH Micro/Bloom 8ml/16ml
armor si 5ml
koolbloom 5ml
cal-mag 5ml
mammoth p/great white/hydroguard for bennies

recently added floranectar at the recommended 10ml per gallon, wondering if I should have left this out, not something I previously used.

PH has been very stable in the 55 gal, sitting right at 6.0-6.1 most days avg 1400 ppm, I'll adjust it down if needed but I've honestly just been letting it sit. After I noticed the leaf issue and thought it might be calcium or nute lockout I flushed the system and refilled with clean nutes, ppm was 1600 so i added some plain RO to bring it down to 1400.

Picture is same plant/bud, just with and without flash. The healthiest/best buds are on a different plant and show none of the issues, so I've been kinda leaning towards just letting her ride it out but the recommendation is 8-9 weeks so I'll need to nurse her a bit.

CannaCountry · Dec 27, 2019

I'd guess, she's simply hungry, otherwise, it looks like you're going to be a happy cat once she's done. Good luck friend.

sandman83 · Dec 27, 2019

CannaCountry said:
I'd guess, she's simply hungry, otherwise, it looks like you're going to be a happy cat once she's done. Good luck friend.

Thanks, was hesitant to bump the nutes up for fear of burning but I don't want to leave em hungry. Will check the ppm after a day and see if they want more again.

westcoast420 · Dec 27, 2019

sandman83 said:
Thanks, was hesitant to bump the nutes up for fear of burning but I don't want to leave em hungry. Will check the ppm after a day and see if they want more again.

Sorry that guy doesnt know what hes talking about. At 1400 plus ppm you are not underfeeding them, the opposite is most likely. I would be dropping the calmag 100% your micro has enough in it at this stage. You are locking out because of too much cal mag most likely and overfeeding.

sandman83 · Dec 27, 2019

westcoast420 said:
Sorry that guy doesnt know what hes talking about. At 1400 plus ppm you are not underfeeding them, the opposite is most likely. I would be dropping the calmag 100% your micro has enough in it at this stage. You are locking out because of too much cal mag most likely and overfeeding.

I can always add some RO and dilute the PPM down, or drain and refill again if need be. @Renfro If you wouldn't mind giving a tie breaker? Haven't run lucas formula prior, just the 3 part GH line.

westcoast420 · Dec 27, 2019

Is the flo and grow a hydro bucket system?

sandman83 · Dec 27, 2019

westcoast420 said:
Is the flo and grow a hydro bucket system?

yeah its a flood and drain bucket system with controller.

westcoast420 · Dec 27, 2019

Ya thats what i thought. Have you run this system before with that recipe? Like I said extra calmag is not necessary in flower feeding 8ml of micro. I used gh for over 10 years and the only time id ever get lockout issues would be when Id add calmag in flower on top of micro. Also I use armor si as well and i believe that max recommended dose is 4ml per gal.

sandman83 · Dec 28, 2019

Correction, I am running 2.5ml per gal of armor si, the recommended full strength not max strength, double checked the label this morning. I'm going to monitor them and see if it gets worse, if not I will take your recommendation, dump the tank again and just refill with plain lucas formula no additives.

Some of the buds on that plant are unaffected, I just want to stay ahead of any issues since a sativa leaning pheno might take longer to ripen than I planned.

And nope, first run, new room, new system, fresh nutes. Been prolly a decade since I touched the hobby and forgot a bunch but it's coming back slowly.

DaleW · Dec 28, 2019

sandman83 said:
Like the title states, plants are larger than I planned and might be rootbound in the 2 gal flo and gro. New system to me and been very long time so just looking for a 2nd pair of eyes. week 5 of flower, lower leaves started to yellow slightly but I left it as I didn't want to increase N at this point. Started noticing brown spotting on one girl, she is the lankiest and stretched the most, seems to use the most nutes. One other is a similar pheno and is starting to show similar symptoms.

GH Micro/Bloom 8ml/16ml
armor si 5ml
koolbloom 5ml
cal-mag 5ml
mammoth p/great white/hydroguard for bennies

recently added floranectar at the recommended 10ml per gallon, wondering if I should have left this out, not something I previously used.

PH has been very stable in the 55 gal, sitting right at 6.0-6.1 most days avg 1400 ppm, I'll adjust it down if needed but I've honestly just been letting it sit. After I noticed the leaf issue and thought it might be calcium or nute lockout I flushed the system and refilled with clean nutes, ppm was 1600 so i added some plain RO to bring it down to 1400.

Picture is same plant/bud, just with and without flash. The healthiest/best buds are on a different plant and show none of the issues, so I've been kinda leaning towards just letting her ride it out but the recommendation is 8-9 weeks so I'll need to nurse her a bit.

I use to have that problem around week 4-5 and the only thing that solved was pk 13/14 from canna. I am not saying that is the sure answer i just know that it turned things around for me.

sandman83 · Dec 28, 2019

DaleW said:
I use to have that problem and the only thing that solved was pk 13/14 from canna. I am not saying that is the sure answer i just know that it turned things around for me.

looks like a PK booster? I think the koolbloom is similar I'm not 100% on the canna line up. Farthest along soil plant is showing similar markings now, I'm leaning towards it being a deficiency for sure now, haven't been using calmag on the soil just tap water + maxibloom.

DaleW · Dec 28, 2019

sandman83 said:
looks like a PK booster? I think the koolbloom is similar I'm not 100% on the canna line up. Farthest along soil plant is showing similar markings now, I'm leaning towards it being a deficiency for sure now, haven't been using calmag on the soil just tap water + maxibloom.

Yeah i believe that it is. Its only used for one week. Ive never used kool bloom but if it is similar your issue may be different from what mine was.

sandman83 · Dec 28, 2019

DaleW said:
Yeah i believe that it is. Its only used for one week. Ive never used kool bloom but if it is similar your issue may be different from what mine was.

No worries i appreciate any input right now! I started adding the koolbloom in after the 2 week stretch.

sandman83 · Dec 28, 2019

Same leaf blotchiness, can't tell if it is spreading so I'll snap pictures each morning of the bud to monitor.

ph stable at 6.2, ppm dropped a tad to 1600. Soil plants showing similar deficiency now.

MrToad69 · Dec 28, 2019

Bump pH a touch as well..closer to 6.5 to help with Calcium and nute absorption

westcoast420 · Dec 28, 2019

MrToad69 said:
Bump pH a touch as well..closer to 6.5 to help with Calcium and nute absorption

Hes in hydro so higher ph will lock out other nutrients. Dude just an FYI 1600 is VERY high ppm, especially in hydro. I run high ppm when in gh but rarely ran more than 12-1300, and that was with 7-8’ trees indoors in 20 gal pots. 1600 is way too high man. Even at 14 your very high. And yes pk 13/14 is similar to kB liquid, kB is 0-10-10 if my memory serves me right. Also in your last picture you can see the tips of the leaves on the tops starting to go yellow and brown, this is just the first sign your overfeeding. Take a look at the rest of your plants and see if they have tip burn. Take my advice for what you like, but I’ve run a 30kw place for over a decade and have been growing for twice that time.

westcoast420 · Dec 28, 2019

Also in straight hydro most run 5.5 to 5.8 ph, 6 plus is too high in hydro.

rustyshaclkferd · Dec 28, 2019

sandman83 said:
Like the title states, plants are larger than I planned and might be rootbound in the 2 gal flo and gro. New system to me and been very long time so just looking for a 2nd pair of eyes. week 5 of flower, lower leaves started to yellow slightly but I left it as I didn't want to increase N at this point. Started noticing brown spotting on one girl, she is the lankiest and stretched the most, seems to use the most nutes. One other is a similar pheno and is starting to show similar symptoms.

GH Micro/Bloom 8ml/16ml
armor si 5ml
koolbloom 5ml
cal-mag 5ml
mammoth p/great white/hydroguard for bennies

recently added floranectar at the recommended 10ml per gallon, wondering if I should have left this out, not something I previously used.

PH has been very stable in the 55 gal, sitting right at 6.0-6.1 most days avg 1400 ppm, I'll adjust it down if needed but I've honestly just been letting it sit. After I noticed the leaf issue and thought it might be calcium or nute lockout I flushed the system and refilled with clean nutes, ppm was 1600 so i added some plain RO to bring it down to 1400.

Picture is same plant/bud, just with and without flash. The healthiest/best buds are on a different plant and show none of the issues, so I've been kinda leaning towards just letting her ride it out but the recommendation is 8-9 weeks so I'll need to nurse her a bit.

Immobile nutrient issues dont visually correct as dmg is dmg, but if new growth is fine. Let it ride

MrToad69 · Dec 28, 2019

Sorry..my bad..I thought you were in soil.

Kushash · Dec 28, 2019

sandman83 said:
Like the title states, plants are larger than I planned and might be rootbound in the 2 gal flo and gro. New system to me and been very long time so just looking for a 2nd pair of eyes. week 5 of flower, lower leaves started to yellow slightly but I left it as I didn't want to increase N at this point. Started noticing brown spotting on one girl, she is the lankiest and stretched the most, seems to use the most nutes. One other is a similar pheno and is starting to show similar symptoms.

GH Micro/Bloom 8ml/16ml
armor si 5ml
koolbloom 5ml
cal-mag 5ml
mammoth p/great white/hydroguard for bennies

recently added floranectar at the recommended 10ml per gallon, wondering if I should have left this out, not something I previously used.

PH has been very stable in the 55 gal, sitting right at 6.0-6.1 most days avg 1400 ppm, I'll adjust it down if needed but I've honestly just been letting it sit. After I noticed the leaf issue and thought it might be calcium or nute lockout I flushed the system and refilled with clean nutes, ppm was 1600 so i added some plain RO to bring it down to 1400.

Picture is same plant/bud, just with and without flash. The healthiest/best buds are on a different plant and show none of the issues, so I've been kinda leaning towards just letting her ride it out but the recommendation is 8-9 weeks so I'll need to nurse her a bit.

There are different scales for ppms. 500 and 800 scale ppm meters have different e/c's.
What are you feeding the plant in soil?

Leaf diagnosis request - burn or deficiency?

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