black/brown spots on leaves, please help!

jellis

jellis

Member
Whats up rolliup community. So here is the specifics about my grow:

I'm growing one white widow clone in fox farms happy frog soil indoors under 140 watts of cfl lights (mix of 6500k and 2700k). Been about a month vegging, started ferts (botanicare grow) about 2 weeks ago. The problem I'm having is my leaves are developing some kind of disease, deficiency, fungus, or something of the sort. They first get a filmy look to them, then they start losing color and getting rusty spots on them, and now the rusty spots are spreading and turning into large black spots on the leaves. I suspected this is a magnesium or calcium deficiency so I watered with cal-mag plus, botanicare grow, and 1.5 tbsp molasses / gal. The problem still escalated. Today I flushed/leached with clearex and watered with distilled water at a ph of 6.5. The runoff of the flushed water read about ph 6 so maybe my soil is too acidic. I also have been seeing these really tiny whiteish bugs, the same shape as a grain of rice but much smaller. They haven't been getting out of control and I don't see many - maybe because theyre so fcking small!

Anyways if anyone can tell me their thoughts on what this is I'd greatly appreciate it! Thanks
 

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caspperrr

Member
jellis said:
Whats up rolliup community. So here is the specifics about my grow:

I'm growing one white widow clone in fox farms happy frog soil indoors under 140 watts of cfl lights (mix of 6500k and 2700k). Been about a month vegging, started ferts (botanicare grow) about 2 weeks ago. The problem I'm having is my leaves are developing some kind of disease, deficiency, fungus, or something of the sort. They first get a filmy look to them, then they start losing color and getting rusty spots on them, and now the rusty spots are spreading and turning into large black spots on the leaves. I suspected this is a magnesium or calcium deficiency so I watered with cal-mag plus, botanicare grow, and 1.5 tbsp molasses / gal. The problem still escalated. Today I flushed/leached with clearex and watered with distilled water at a ph of 6.5. The runoff of the flushed water read about ph 6 so maybe my soil is too acidic. I also have been seeing these really tiny whiteish bugs, the same shape as a grain of rice but much smaller. They haven't been getting out of control and I don't see many - maybe because theyre so fcking small!

Anyways if anyone can tell me their thoughts on what this is I'd greatly appreciate it! Thanks
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I would say over fert or ph problem try backing the nutes off a bit also how close to the light are they? it definately look like some kind of burn with the way the leave edges are twisting and curling up.
 
jellis

jellis

Member
caspperrr said:
I would say over fert or ph problem try backing the nutes off a bit also how close to the light are they? it definately look like some kind of burn with the way the leave edges are twisting and curling up.
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Ok I'll try cutting it back. The lights were about 1" from the tops of the plant and I just moved them up about 3" because the temps were around 88F. The thing is though, those leaves that I pulled off are from the middle/bottom of the plant. The black spots started at the bottom and made its way up and there's no black spots on the top leaves so I don't know if its a burn from the light. I'll try to adjust ph more precisely and go easy on nutes...does anyone else think differently?
 
J

jackdirty

New Member
flush ur plants soil is a great buffer might want to add some mag and cal additive which usually helps when i have that problem or its a rust fungus and they sell spray for that at the grow shops... those are your two options if its not a fert burn
 
fatfarmer34

fatfarmer34

Well-Known Member
I can tell you this, about a year ago I bought 6 bags of that soil. I had twelve plants going all clones from same plant and about a third of them developed the same symptoms. In my situation the PH was hard to keep under control it kept dropping alot. I think one or more of the bags must have been off as far as mixture of their additives, greatly reducing the margin of error. I am now using promix under same conditions and my garden could not be healthier. I wonder if any body else has had the same problems with Happy Frog, I don't want to bad mouth a company unless they deserve it.
 
jellis

jellis

Member
Motorbreath said:
does sort of look like over fert...are the leaves still moist or are they crispy?
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The ones on the plant are moist but the ones in the pic are a lil crispy. I'm thinking either over fert or ph problem plus a possible calcium deficiency from the rusty looking dots on the leaves still on the plant.

jackdirty said:
flush ur plants soil is a great buffer might want to add some mag and cal additive which usually helps when i have that problem or its a rust fungus and they sell spray for that at the grow shops... those are your two options if its not a fert burn
Click to expand...
Hmm, i did add some cal-mag last week, I'll try to add it again in my next watering. Also will look into that fungus - i did spray some fungicide on the plants less than a week ago btw.

fatfarmer34 said:
I can tell you this, about a year ago I bought 6 bags of that soil. I had twelve plants going all clones from same plant and about a third of them developed the same symptoms. In my situation the PH was hard to keep under control it kept dropping alot. I think one or more of the bags must have been off as far as mixture of their additives, greatly reducing the margin of error. I am now using promix under same conditions and my garden could not be healthier. I wonder if any body else has had the same problems with Happy Frog, I don't want to bad mouth a company unless they deserve it.
Click to expand...
Thats interesting man, I was looking up ph problems on mj plants and the leaves in the pics looked really similar to mine so I'm really leaning towards it being the ph is off. I think I'm going to water with 7 ph'd water to offset the acidity in the soil...hopefully. Its funny because I was growing this ww clone's mother this past summer in Miracle Grow moisture control soil and didn't have any kind of problems like these.


...Thanks for the replies!
 
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