Help with autoflower spots on leaves
- Thread starter chonger91
- Start date
BlueRidgeGrower
Well-Known Member
Mine had some spots similar to those. My issue was magnesium deficiency.
thanks for reply mate, yes i have seen pictures of it that look similar to min. I just hope it isnt these rust spots that I have came across during research, they seem bad lol. What did you do t fix it may I ask? Or is it obvious, add magnesium haha cheers man
HONEYCOMBHILLZ
Active Member
I had the same issue with mine,still trying to fix the problem
BlueRidgeGrower
Well-Known Member
Pretty obvious lol. Yea magnesium. I think it's either Epsom Salt or worm castings so research that first but I know you can top dress and water for it. I personally use the CAL MAG from my General Organic GO box. I just mix the cal mag into every water.
ok mate i can get some cal mag off a friend so ill get it soon, did your turn around well? if so how quickly? I forgot to mention its autoflower sweet tooth, cheers
Jypsy Dog
Well-Known Member
You have to FIX your pH to Fix the issue. It's a Calcium/ Mag Lock Out.
https://www.sensigarden.com/calcium-deficiency-marijuana/
Leaves Green with spots= Calcium
Leaves Yellowing with spots= Magnesium
https://www.sensigarden.com/calcium-deficiency-marijuana/
Leaves Green with spots= Calcium
Leaves Yellowing with spots= Magnesium
Last edited:
whitebb2727
Well-Known Member
You don't know that. Its common for cal/mag problems under blurple led.
Cal/mag can be an issue under those type leds.
You need to get a pic under natural or white light for anyone to know for sure.
Its actually in o e of the sticky threads in the new or problem section of the site. It ask to turn off hps or led and take a natural pic.
Jypsy Dog
Well-Known Member
OK.... Will see if it tracks back to pH. Lights can cause the plant to require more Calcium. But they have to be able to Uptake it to use it. Don't care what kind of light it is.
nameno
Well-Known Member
My last grow I used all coco and had a cal-mag def that was fixed by adding cal quickly.
Jypsy Dog
Well-Known Member
Coco requires an initial heavy dose of Calcium for the medium to retain what you add in future waterings/ feedings. http://www.growweedeasy.com/coco-coir You still need to keep the pH in range to fend off further issues.
BlueRidgeGrower
Well-Known Member
The leaves affected don't go back to normal but no new damage should occur after dosing I think. At least that's how it's working for me man.
BlueRidgeGrower
Well-Known Member
Yea I had read somewhere that these Blurples are Cal-Mag whores. Exact words I believe lol.
nameno
Well-Known Member
I don't know about lights but I was told with coco to use calmag.
My last grow I used all coco and had a cal-mag def that was fixed by adding cal quickly.
whitebb2727
Well-Known Member
The op never said they were in coco.
What type water? How much and how often?
Nutes? What kind and how often?
It amazes me that people make diagnoses without all the info.
Let us know all that info and vet a pic in natural light. If nothing else turn the led off and use the flash on the camera of hang a cfl in the 5000-6500 Kelvin range.
You will only get guesses until then.
Whole plant pic in natural light.
What medium? Soil? Coco?
What type water? How much and how often?
Nutes? What kind and how often?
It amazes me that people make diagnoses without all the info.
Let us know all that info and vet a pic in natural light. If nothing else turn the led off and use the flash on the camera of hang a cfl in the 5000-6500 Kelvin range.
You will only get guesses until then.
Whole plant pic in natural light.
Jypsy Dog
Well-Known Member
No questions about the pH???? Should be the first... Unless it's insect damage.
Jypsy Dog
Well-Known Member
LED does get a paragraph in this article... Must mention pH 20+ times. http://www.ilovegrowingmarijuana.com/nutrients-deficiency-calcium/
whitebb2727
Well-Known Member
Nope. Ph is not the first question. Medium is. If its in soil ph really doesn't matter. As organic matter decays it creates ions that buffer ph.
Now if its coco or hydro then ph would be higher up on the list but still not my first question.
whitebb2727
Well-Known Member
whitebb2727
Well-Known Member
Ph is important. Lets take soil. It buffers ph but it still needs a proper wet dry cycle. As the soil dries the ph swings to allow proper nutrient uptake.
In hydro the ph swings in between res changes.
Not saying to not worry about ph. Just saying its not the issue.
The op is not having a ph problem.
In hydro the ph swings in between res changes.
Not saying to not worry about ph. Just saying its not the issue.
The op is not having a ph problem.