Yellowing leaves and brown spots

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PCguy564

Active Member
I would say its been about 4-5 weeks into flower and I feel like I've been doing the right things but the past week or so there has been some deterioration and I'm a little stumped at what it could be. Been feeding the fox farm at half dose and the cal mag at full dose. I did just first full dose of tiger bloom just a day ago which might've been a mistake.
Strain is AK48 from Nirvana 2 plants in scrog
Fox farms ocean forest soil
5 gallon smart pots
Fox farm tiger bloom with emerald harvest calmag
Watering every time I dig my finger in and it feels dry which comes out to every 3 days and feeding every other watering
PH has been 6.6-6.7 going in every time I water and feed, runoff has been 6.4 for the few times I test it, this is using a Bluelab ph meter
400W HPS with a viparspectra 300w as a supplemental both sit around 12 inches or so from the canopy
Temperatures in the tent is 75-80F
Attached pictures are what I have been seeing, I could post alot more but I don't think its needed.
 

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bankheadstoner

Active Member
PCguy564 said:
I would say its been about 4-5 weeks into flower and I feel like I've been doing the right things but the past week or so there has been some deterioration and I'm a little stumped at what it could be. Been feeding the fox farm at half dose and the cal mag at full dose. I did just first full dose of tiger bloom just a day ago which might've been a mistake.
Strain is AK48 from Nirvana 2 plants in scrog
Fox farms ocean forest soil
5 gallon smart pots
Fox farm tiger bloom with emerald harvest calmag
Watering every time I dig my finger in and it feels dry which comes out to every 3 days and feeding every other watering
PH has been 6.6-6.7 going in every time I water and feed, runoff has been 6.4 for the few times I test it, this is using a Bluelab ph meter
400W HPS with a viparspectra 300w as a supplemental both sit around 12 inches or so from the canopy
Temperatures in the tent is 75-80F
Attached pictures are what I have been seeing, I could post alot more but I don't think its needed.
Click to expand...
So I'll try my best to at least shad some light on your situation. So it looks like nutrient burn and or heat stress . It looks like the tops that's closer to the light is the problem and you can tell if it's heat stress from the light if the tops closer to the light is the problem which because the leaves starting to curl on the outside.
Now it may be nute burn and that also burns the tips and turn leaves yellow .
But my first reaction to one of the pictures was bugs and I think it was the first pic I looked at
 
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PCguy564

Active Member
bankheadstoner said:
So I'll try my best to at least shad some light on your situation. So it looks like nutrient burn and or heat stress . It looks like the tops that's closer to the light is the problem and you can tell if it's heat stress from the light if the tops closer to the light is the problem which because the leaves starting to curl on the outside.
Now it may be nute burn and that also burns the tips and turn leaves yellow .
But my first reaction to one of the pictures was bugs and I think it was the first pic I looked at
Click to expand...
I can see the heat stress as it has been hot and even with an AC unit its been much more warmer than I wanted. But nute burn I wouldn't expect unless even half strength all this time is too much. I guess the tips do give it away. I did move the lights further away, hope they don't stretch stupidly like last time

hotrodharley said:
My first question is are you using a mycchoriza inoculant? And molasses to feed it?
Click to expand...
Nope
 
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Beachwalker

Well-Known Member
PCguy564 said:
I would say its been about 4-5 weeks into flower and I feel like I've been doing the right things but the past week or so there has been some deterioration and I'm a little stumped at what it could be. Been feeding the fox farm at half dose and the cal mag at full dose. I did just first full dose of tiger bloom just a day ago which might've been a mistake.
Strain is AK48 from Nirvana 2 plants in scrog
Fox farms ocean forest soil
5 gallon smart pots
Fox farm tiger bloom with emerald harvest calmag
Watering every time I dig my finger in and it feels dry which comes out to every 3 days and feeding every other watering
PH has been 6.6-6.7 going in every time I water and feed, runoff has been 6.4 for the few times I test it, this is using a Bluelab ph meter
400W HPS with a viparspectra 300w as a supplemental both sit around 12 inches or so from the canopy
Temperatures in the tent is 75-80F
Attached pictures are what I have been seeing, I could post alot more but I don't think its needed.
Click to expand...
Talk about your humidity

Ps. F f o f likes pH 6.5 (keep it there for best results) stop adding Cal Mag for a minute. Also I don't believe you have a root issue, so those additives mentioned above which I often use too, will help in this case

(Not saying it's septoria, however I've been interested in and dealing with septoria this time of year for the last 3 years, and in the last couple of weeks I've seen more septoria posts that I've ever seen before all together?!, so it should at least be a consideration, just my opinion)
 
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PCguy564

Active Member
Beachwalker said:
Talk about your humidity

Ps. F f o f likes pH 6.5 (keep it there for best results) stop adding Cal Mag for a minute. Also I don't believe you have a root issue, so those additives mentioned above which I often use too, will help in this case

(Not saying it's septoria, however I've been interested in and dealing with septoria this time of year for the last 3 years, and in the last couple of weeks I've seen more septoria posts that I've ever seen before all together?!, so it should at least be a consideration, just my opinion)
Click to expand...
Humidity has been around 55-75% through out the day here recently. It gets to 75% in the morning even with exhaust fan on and pumping to the outside. I'll take your word on the 6.5 pH, less ph up to use which I already use alot because of hard acidic 5.8 pH tap water
 
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Beachwalker

Well-Known Member
20180616_062955.jpg

Well Jim given your high humidity, and because I've seen a lot of septoria lately, also because of your pictures I'm going to suggest you search 'septoria' and see if the description fits (sadly I think it does)

I have a thread here called septoria that just started, haven't got much info in it yet but there's a little bit, might help ?
-good luck!
 
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PCguy564

Active Member
Beachwalker said:
View attachment 4154763

Well Jim given your high humidity, and because I've seen a lot of septoria lately, also because of your pictures I'm going to suggest you search 'septoria' and see if the description fits (sadly I think it does)

I have a thread here called septoria that just started, haven't got much info in it yet but there's a little bit, might help ?
-good luck!
Click to expand...
I've seen the thread but I really don't want to say its septoria I could be wrong but could there just be a phosphorous deficiency instead? Something locking that out? and the reason why I ask this is the pictures don't show the purple stems which show on every affected leaf and not on healthy leaves. This was my first reaction upon seeing the issue before I even made the thread.
 
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Beachwalker

Well-Known Member
Sure could be, but definitely something to consider I chased it for months before I figured it out first time I had it

Everything was spot on except my environment that's how I figure it out

but now I can look at it and have a pretty good idea, just saying it's something to consider
-good luck!

Ps. In that picture where I'm holding the leaf that has the one spot (notice the dark ring around it) that's the classic indicator, if you can find that type spot that'll give you a good idea
 

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propertyoftheUS

propertyoftheUS

Well-Known Member
Doubt it is septoria, looks more like calcium deficiency caused by pH dropping due to "salt" build up caused from not feeding with enough runoff to leach old nutes out of the soil. Check the pH and ppm of your runoff... Looks like a little heat stress or over transpiring too
 
JohnDee

JohnDee

Well-Known Member
PCguy564 said:
I already use alot because of hard acidic 5.8 pH tap water
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PCGuy...hard water is, dare I say...always high rather then low ph. Just want you to be clear on your water issue.

Maybe when you add a bloom boost next time...reduce your other nutrients. It's the total ppm that promotes burn though N is often the big one.

Oh and just a little compliment on providing lots of info and good pictures.

One more comment is that AK48 is a sativa leaning strain and sats tend to be light feeders. But I've never grown that strain.

My opinion is that it was nute burned partially from your addition of Tiger Bloom to a rich regimen and potent base soil.
JD
 
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PCguy564

Active Member
JohnDee said:
PCGuy...hard water is, dare I say...always high rather then low ph. Just want you to be clear on your water issue.

Maybe when you add a bloom boost next time...reduce your other nutrients. It's the total ppm that promotes burn though N is often the big one.

Oh and just a little compliment on providing lots of info and good pictures.

One more comment is that AK48 is a sativa leaning strain and sats tend to be light feeders. But I've never grown that strain.

My opinion is that it was nute burned partially from your addition of Tiger Bloom to a rich regimen and potent base soil.
JD
Click to expand...
My well water isn't really what would be hard but there is more junk in it than I would want

Anyway I just came back to say I did solve the humidity issue and temperature which only required just taking the tent exhaust and exhausting into the room instead of outside. Venting outside made more sense at the start as I didn't have the AC but since I have the AC now I don't have to as it can keep up with the heat. Now temps are 66-72f and humidity is at 48-55%
I did give a flush and the issue hasn't gotten any worst it seems but time will tell. I'll be less heavy on the nutes and I'll try to post some pics at harvest. Thanks for the help guys
 
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CannaCountry

Well-Known Member
Looks a little short on calcium, and a little high on the heat / light stress. It appears you kissed them with just a smidge too much feed as well (burnt tips). There are calcium amendments you can add specifically to help, although they tend to lend other nutrients to your feed, namely N, so be careful if you go that route. Sounds like you adjusted your temps and lights, so you should be good there. Keep us posted and good luck.
 
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