UrbanHillbilly
In Bloom
This leaf is from a plant in late veg. Any idea what's going on?
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What are these spots?
- Thread starter UrbanHillbilly
- Start date
Not enough to go on, guessing its just one off physical damage not indicative of anything to worry about. That said, whole plant pics and more info needed.
DemonTrich
CHOOSE YOUR TITLE
Did you accidentally get some h2o while watering in the plants? Water drops can act like a magnifying glass under light and cause those same looking spots.
greenmachine29
In Bloom
To me that looks something pathogenic in nature. Leaf spot could be froma
Number of different fungal disease. I would take it off as it becomes visible. What’s your airflow like? Adequate, or sometimes they only pop up when tents get super full at end of veg and there is microclimates or “hot spots” in area that the air becomes stagnant
Number of different fungal disease. I would take it off as it becomes visible. What’s your airflow like? Adequate, or sometimes they only pop up when tents get super full at end of veg and there is microclimates or “hot spots” in area that the air becomes stagnant
UrbanHillbilly
In Bloom
That's likely the answer
webeblzr
In Bloom
This just my take on the magnifying theory.
I've been spraying my plants down with a spray bottle for ages.
All during my HID years, and LED usage.
The only time I saw those spots on my leaves, is when I was spraying nutrients, like in foliar feeding, with my lights were still on.
As the water evaporated, the fertilizing salt's, burn the tissue of the leaf.
If you foliar during lights out, you will not see the spots form.
I mean no disrespect to anyone, just what I've observed.
I've been spraying my plants down with a spray bottle for ages.
All during my HID years, and LED usage.
The only time I saw those spots on my leaves, is when I was spraying nutrients, like in foliar feeding, with my lights were still on.
As the water evaporated, the fertilizing salt's, burn the tissue of the leaf.
If you foliar during lights out, you will not see the spots form.
I mean no disrespect to anyone, just what I've observed.
greenmachine29
In Bloom
I’ve been hanging here for a minute and have not seen an ounce of disrespect on this forum! My either, but this positive coming together seems to be the underlying culture here so honestly it goes without saying
I know exactly what you mean with the foliar spray induced spots. And anything is possible but when I look at a blemish or spot I first think “ does this thing look/ act like it’s own living organism. Is the geometry of the shape organic and more random in nature or does it look uniform and spread evenly throughout the whole grow space.
Then we can narrow it down from there. All plants exhibit the blemish at same time and randomly through elevation of canopy? Likely a nutrient def, or something the human has done to a plant.
One back corner showing what appears to be a randomness that only an organism can create . Likely microclimate allowing something to propagate itself and an environmental issue.
Then we can go from there fixing the def/ toxicity. Or changing practices like foliar feeding mainly st night. Or deeper into what kind of pathogen it could be.
At the end helping each other is hard online either way. So many opinions which could all be correct, incorrect or more often, a bit of both. Without hands on experience which is often necessary for true diagnosis. Either way happy 420!!!!
greenmachine29
In Bloom
And just for sake of healthy debate and devils advocate….. spraying plants in general could trigger the same humidity/moisture spikes which really are breeding ground for leaf spot fungal type diseases. So seeing it after you spray could in fact be the cause, but perhaps not the culprit. Just shitballing here
Psychobilly
Kaese Kaiser
The reason water drops on a plant CAN cause damage, is from city water systems that have chlorine in them. That's why rain water doesn't burn anything; there's no dried chlorine leftover to cause the burn.
greenmachine29
In Bloom
I know there is a major fear of chlorine…. I’ve been doing this for along time and shit you not I’m ready to add chlorine to my well water lol!!!
using pool water ain’t gunna help nothing but let’s not forgot chlorine is indeed an important micronutrient responsible for water transport and photosynthesis. So idk.
Just as mobile as N so I imagine any chloride molecules can be absorbed through plant tissue without any real trouble . Again some microscope effect on leaves when lights hits water droplets? Maybe. But Chlorine as a dried left over burning agent on plant tissue? At the Ppms that come from city tap, idk….
Now if we got some super high sodium levels, now theee is a plant damaging molecule. And some WELL water can be very high is sodium which can definitely burn a plant
Psychobilly
Kaese Kaiser
I've used city water to water my plants before when we had well issues a few years ago, but mostly they get ground water. Mainly because that's what we have. But I haven't ever had any issues with burns, though it was another story when I lived in the city. The only time I normally spray my plants is if they have some PM on them, because Green Clean is useful for that, and the .... I can't remember the name of it now... It's a nutrient mix I use when I have new clones I just cut. I imagine different types of light could affect some of that too though, but all I have are LED lights so I can't test it.
Rozgreenburn
"The Philosopher, is Stoned"
Chlorine will evaporate out of city water if left uncovered for a day or two. I have hard well water with plenty of minerals in it. I also collect rainwater, which works well, when switching back and forth. I'll use the rainwater on seeds and seedlings. Well water works better in my cloner. I try to give them what they want.
I don't have a water softener, so there is no salt!
I don't have a water softener, so there is no salt!
Captain Sternn
Amicable Cannastronaut
I've done that before, not from foliar but just from getting wild and sloppy when watering, especially when they are small. Now I'm more careful
Agreenpassion
CHOOSE YOUR TITLE
I've got leaf burn on 2 leggy Cherry Kool Aid ladies I splashed 2 days back in a hurry.
And I've seen the white, dried spotting/residue/deposits from water that did not get the magnify treatment at times.
()***I think we need more pics.***() I'd be concerned by the color, mottling and shape that something fungal would be a thought. But we need more images for sure.
There are also apps and such that can diagnose fungal infections' outward symptoms using pictures. Just found that out recently. Cool.
And I've seen the white, dried spotting/residue/deposits from water that did not get the magnify treatment at times.
()***I think we need more pics.***() I'd be concerned by the color, mottling and shape that something fungal would be a thought. But we need more images for sure.
There are also apps and such that can diagnose fungal infections' outward symptoms using pictures. Just found that out recently. Cool.
webeblzr
In Bloom
I'm also a well water user, mine however is around 575 PPM's unfiltered, from the well.
I did see spots when I ran all HID's, bare naked bulbs, hung vertical, in a full blown krusty bucket set up, I made many years ago.
I ran that for about 2 years, with 3400 watts total . Loud and it ran 24/7/365 !
In a krusty bucket, the lower bucket has a coil of soaker hose, run through a spacer, that second bucket sits on.
Connect the soaker to a high output pump, a Thomas pump, and the hydro juice, turns to vapor, so much so I watch it work up through the 21 ponds of lava rock.
Sometimes when the vapor would leave droplets on the leaves, I'd see blemishes form on the lower leaves.
The vapor really helped EXPLODE the root mass to crazy proportions.
Roots could get back to the sunken reservoir, 34 feet away from the grow area.
That is where/when I formulated my idea of salt evaporation maybe a culprit.
webe
I did see spots when I ran all HID's, bare naked bulbs, hung vertical, in a full blown krusty bucket set up, I made many years ago.
I ran that for about 2 years, with 3400 watts total . Loud and it ran 24/7/365 !
In a krusty bucket, the lower bucket has a coil of soaker hose, run through a spacer, that second bucket sits on.
Connect the soaker to a high output pump, a Thomas pump, and the hydro juice, turns to vapor, so much so I watch it work up through the 21 ponds of lava rock.
Sometimes when the vapor would leave droplets on the leaves, I'd see blemishes form on the lower leaves.
The vapor really helped EXPLODE the root mass to crazy proportions.
Roots could get back to the sunken reservoir, 34 feet away from the grow area.
That is where/when I formulated my idea of salt evaporation maybe a culprit.
webe
Psychobilly
Kaese Kaiser
I was curious about the HIDs and how that would affect water spots. Aren't HIDs the ones that get super hot ? My indoor experience is lacking, and I'd even call that an understatement LOL. I've only ever used LEDs thus far.
DemonTrich
CHOOSE YOUR TITLE
Hps/mh/cmh all get hot!
I just fired up my cmh for faster mom growth for clone season. My arms and back of neck were tingling from the uvb.
I just fired up my cmh for faster mom growth for clone season. My arms and back of neck were tingling from the uvb.
Psychobilly
Kaese Kaiser
That's another thing I've not had much experience with; the different types of light changing how the plant itself grows and does it's thing. I find that interesting to be honest. I'm used to just "OK they're rooted good and it's OK outside now, so out they go" and the Sunlight does the rest, and I had no idea until I joined here, that different types of Lights could actually affect how it grew.
It would be interesting to see side by side, or, more likely, tent by tent, comparisons of a clone being grown under different types of lights, but with the other settings all the same.
DemonTrich
CHOOSE YOUR TITLE
Cmh rocks it! I was running 4x 315w cmh in air cooled hoods, with co2, dialed in 100%, with certain genetics, I was pulling just about 4lbs (dried/cured) per run with only 1265w of light.
Psychobilly
Kaese Kaiser
Bro that's impressive ! I've heard CMH can get really hot when it's running, so it's nice to see there's an AC version LOL. In law has another type of light he doesn't use much, but it gets REALLY warm. The giant ass heat sink on top of that thing is nuts too. I remember one day he wanted me to check his plants, and when I opened that tent up, it was like a blast of heat right in the face. I'm honestly not even sure what kind of light that one is, other than "the hot one". I swear you could run that thing in the middle of January without a heater in there.
