Purple spots on leaves / Northern Lights

hi folks

Ive found some purple spots on my leaves. Also u can see yellowing and other horror in my grow but thats another story. They were root bounded and had to transplant them in day 15 in Flower (It was around 3-4 days ago). Anyway they seem to be ok now except this purpling issue. My guess is underfeeding cause they still get just 2ml/L BioBizz Bloom.

Set up:


Strain: Northern Lights
Light: 250W CMH
Medium: BioBizz All-mix Soil
Nutes: BioBizz Grow, Bloom and Unsulphured molasses (cause my topmax went off)
Pots: 4Gallon

If you think thats not enough information please have a look at my journal. https://www.rollitup.org/grow-journals/603446-250w-cmh-northern-lights-organic.html



Day 18 in Flo

In the first picture they would be more black spots because it is necrosis. My guess is it might be Mn toxicity. And the other pictures, it is difficult to tell but looks like it could be P deficiency.

Whats your temp differential ?

ynkessuck247 said:

In the first picture they would be more black spots because it is necrosis. My guess is it might be Mg toxicity. And the other pictures, it is difficult to tell but looks like it could be P deficiency.

Whats your temp differential ?

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Hi mate, thanks for your reply! Its weird cause i never gave them extra magnesium. Although, i add 1 tbsp unsulphured molasses (to 1 gallon of water) every watering since i put them in Flo. Im not sure how much magnesium it contains.
Temp is 18°C at night and 21°C when light is on.

P deficiency!! Purple leaves yellowing with necrosis on tips... My money's on that!

i meant Manganese Mn

Man my pride and joy is looking EXACTLY like yours . I transferred mine to a new 5 gal bucket with fresh new water and nutes in hopes to stabilize her but I'm super worried something has gone terribly wrong! So you guys are saying just up the nutes a bit?

ynkessuck247 said:

i meant Manganese Mn

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its kinda confusing pal

its not. it all could be related to Manganese toxicity !! lol

http://www.naturalnews.com/026296_molasses_health_sugar.html

read that and you will see that unsulphured molasses contains high amounts of manganese.

"Manganese, a trace mineral, is very high in content with unsulphured blackstrap molasses. Manganese ions function with a number of enzymes, and are essential to combating unusual free radicals. Like magnesium, manganese also supports cellular absorption of nutrients..."

theres your problem my friend. cut back on every watering, and try applying it every other watering.

ynkessuck247 said:

http://www.naturalnews.com/026296_molasses_health_sugar.html

read that and you will see that unsulphured molasses contains high amounts of manganese.

"Manganese, a trace mineral, is very high in content with unsulphured blackstrap molasses. Manganese ions function with a number of enzymes, and are essential to combating unusual free radicals. Like magnesium, manganese also supports cellular absorption of nutrients..."

theres your problem my friend. cut back on every watering, and try applying it every other watering.

Click to expand...

wow man u really know whats going on here. Ill cut back with molasses. Thanks a lot mate!

A hommie, sometimes when plants get cold or really mature they may purple. The yellowing is from being in flower, slow down and watch
somethN else other than your plant. They all look healthy man, relax. If you don't like the yellowing then cut the leaves. You shoud make a journal and
read it from time-to-time. Not every change is negative, think about "Fall" and "Autumn" trees change colors mane, part of nature bro.
Just make sure you look for pests and you'll be fine bro.