Yellow tips on new growth

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MIGrampaUSA

MIGrampaUSA

Will do! This time watered with plain water, next time gonna do 50% of recommended nutes and see how plant responds.




Would've been really surprised if my first grow went perfect :D Should I remove affected big fan leaves that are in the bottom of the plant or just wait for them to die off?


Thank you both for helping me figure this out! It's very interesting, how 2 different strains react to the same feeding and conditions. This one grew really tall even with LST, yet there are visible issues, sativa ones are smaller and barely show any issues at all, forming nice buds etc. This is a great and entertaining process, really enjoying whole experience so far! Good thing I can always ask for advice from more experienced growers :)
I've got 2 tents going right now. 9 plants total. I frequently find myself mixing different nute strengths based on plant responses. I've got 2 early skunk, and 2 shiskaberries, and then 5 different strains (one plant each). It's pretty common practice to alter feeding schedules based on plant responses.
 
GNick55

GNick55

I've got 2 tents going right now. 9 plants total. I frequently find myself mixing different nute strengths based on plant responses. I've got 2 early skunk, and 2 shiskaberries, and then 5 different strains (one plant each). It's pretty common practice to alter feeding schedules based on plant responses.
absolutely true!
i’m right now keeping everything the same as in nutes, but watering has changed for plants, a couple were overwatered back to back😡.. (i was sick and in pain) couldn’t think right.. anyways no excuses😆, but finally everyone is grooving along nicely.,
that takes some skill @MIGrampaUSA!
anyways don’t want to distract from @Harry_Manback’s thread..
 
Harry_Manback

Harry_Manback

I'm just absorbing all the info I can, no worries! 😃

Been trying to experiment with water amounts etc, since I've got ~5 gallon pots(25l). Just keep reminding myself that plants got individual responses as-well, pretty much like people. Haven't grown anything in quite a while and now just enjoying the process and emotions it evokes. Glad that I've started and so far this is one of the most welcoming communities!
 
MIGrampaUSA

MIGrampaUSA

absolutely true!
i’m right now keeping everything the same as in nutes, but watering has changed for plants, a couple were overwatered back to back😡.. (i was sick and in pain) couldn’t think right.. anyways no excuses😆, but finally everyone is grooving along nicely.,
that takes some skill @MIGrampaUSA!
anyways don’t want to distract from @Harry_Manback’s thread..
I don't either, although I do think we covered a lot that will help @Harry_Manback as he finishes this grow and he'll take everything he's learned and apply it to the next one ... I'm always seeing something new and learning something new as I "grow" along ...
 
Harry_Manback

Harry_Manback

A little update:

First plant doesn't seem to be getting worse. Leaves that already had yellow spots forming are just showing those progress, doesn't look like there are many more appearing.

Second plant of the same strain shows a bit different stuff tho. No yellow spots, just yellow tips on newer leaves like first plant AND dark brown spots on fan leaves. Here are some pictures. Finally got my new PH meter, so will properly measure and adjust water PH.

Otherwise everything else seems to be going fine, as you see not all leaves are affected. Just strange that this one had no yellow spots prior and just went straight into brown patches.

IMG_20210327_144454.jpg
IMG_20210327_144447 c.jpg
 
GNick55

GNick55

A little update:

First plant doesn't seem to be getting worse. Leaves that already had yellow spots forming are just showing those progress, doesn't look like there are many more appearing.

Second plant of the same strain shows a bit different stuff tho. No yellow spots, just yellow tips on newer leaves like first plant AND dark brown spots on fan leaves. Here are some pictures. Finally got my new PH meter, so will properly measure and adjust water PH.

Otherwise everything else seems to be going fine, as you see not all leaves are affected. Just strange that this one had no yellow spots prior and just went straight into brown patches.

View attachment 1107322 View attachment 1107323
just thinking it’s the effects from overwatering, worst case could have a root issue, though how far along are they? think you said 7 weeks last week.
 
GNick55

GNick55

yep, i think your nutrient mix is just off causing a K lockout or just too much in general.
but i’m just talking here meaning i don’t know those nutrients and would have to look up..
i’m hoping maybe someone uses those and can identify the problem more directly.
you can see burnt tips so thats obviously nute burn. the downward cupping can be from that too..
are they at 7 weeks flowering or?
 
Harry_Manback

Harry_Manback

are they at 7 weeks flowering or?
Yup, 7th week ending and on Monday it'll be the beginning of 8th.

Will continue feeding them 50% of recommended nutrient dosage. Burnt tips were present for at least 1.5 weeks but brown patches appeared only on during this week. Other plant that had yellow tips and spots is looking better tho!
 
GNick55

GNick55

Yup, 7th week ending and on Monday it'll be the beginning of 8th.

Will continue feeding them 50% of recommended nutrient dosage. Burnt tips were present for at least 1.5 weeks but brown patches appeared only on during this week. Other plant that had yellow tips and spots is looking better tho!
sometimes brown patches are caused by watering too frequently?
 
Harry_Manback

Harry_Manback

sometimes brown patches are caused by watering too frequently?
Reduces the amount of flowering to 2x per week, and giving them like 2.5-3l(0.6-0.8 gallons) water per watering with 5 gallon pots.


8th week flowering? mmm, you could have a 12 weeker there!
As long as it works out it's OK I guess :) Average time for Gorilla Cookies should be like 10 weeks, according to most of the sources.
 
mancorn

mancorn

Checked for pests and mildew
Do you have a loupe or magnifying glass to inspect your leaves? Most of the problematic critters are too small to see with the naked eye. And even stuff like powered mildew is easier to diagnose with a loupe. Some of your leaves look suspect for critter/PM while others look like a nutrient burn. Just to make sure, you’re testing your pH after adding all your nutrients? (Never used the Fish-Mix, but most fish hydrolysate really knocks down your pH. At recommended rates it will take my water from 7 to 4.)

You might want to do a slurry or pour through test (https://www.extension.purdue.edu/extmedia/HO/HO-285-w.pdf) and check that the pH of your soil is OK. And pick up a cheap ($10-$20) jewelers loupe online if you don’t have one to inspect your plants.
 
Harry_Manback

Harry_Manback

Do you have a loupe or magnifying glass to inspect your leaves?
Yup, been using magnifying glass to check for pests and couldn't find anything. Plus two sativa plants nearby doesn't show any issues at all, I reckon if there would've been any critters they'd be on all the plants in growtent.


Just to make sure, you’re testing your pH after adding all your nutrients?
Thing is, I was only testing soil PH after watering\feeding them, since I had no PH meter for water, now I've got one and will be testing water after adding all the needed nutrients in + doing soil test after. Excluded FishMix for now tho.


Been checking for similar symptoms and those brown spots sure do look a lot like phosphorus deficiency:
 
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Harry_Manback

Harry_Manback

Ok, so my soil PH meter was busted, apparently. Not showing correct measurements, so I've been watering my plants with PH being way too high. I think it wasn't initially broken but might've gone "bad" sometime into the growing process.

This would prolly explain all the lockout issues etc.
 
mancorn

mancorn

Ok, so my soil PH meter was busted, apparently. Not showing correct measurements, so I've been watering my plants with PH being way too high. I think it wasn't initially broken but might've gone "bad" sometime into the growing process.

This would prolly explain all the lockout issues etc.
I had a old battery in a EC meter a few years back and an old bottle of synthetic ferts I found in the garage. My readings were super low compared to the instructions so I keep pouring in the juice (figuring it must have lost it’s mojo). After a week or so I notice the meter is displaying all these weird random characters when I turn it on, and then it finally poops out. Throw in a new battery and my ppm is over 2k.

You need to calibrate your meter. The cheap ones go wacky fairly quickly and only last about a year or 2 before needing to be replaced.
 
Harry_Manback

Harry_Manback

Fed the plants today, 50% of recommended nutrients. Measured water PH and adjusted it after adding those nutrients. Left it around 6.3, so hopefully this will fix all the lockdown issues and plants continue flowering as they should. Had to cut some of the dry and most affected leaves, but trying to not cut too much in a single day.

On the other hand Sativa(Super Lemon Haze) is doing really good, no damage visible, great colas forming and the smell is out of this world! They're shorter, but so far looking way more promising. Kinda interesting that with the same feeding and wrong PH measurements they've been doing so good while Indica plants aren't. Still got time, it's just the beginning of 8th week, so if it'll take couple more weeks than average(10 weeks) for Indica it's not really an issue.
 
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