Please help, what's wrong with this leaf??

az2000

Well-Known Member
Looks like calcium def due to the color, but it's usually more speckled than that. The paleness could be N def.

A photo of the whole plant (under natural light) might help. What stage of growth?
 

orbo

Well-Known Member
I once thought giving my weed a little bit of moonshine might be a good idea, unfortunately that pic is very similar to what it looked like. From what I could tell the roots pulled in the ethanol and it blew out the center of the leaf, just like yours look. I'm not saying that's what you did, just sayin it looks similar - like it pulled something in it didn't like and what you see now is the result. It took almost 2 weeks for the ethanol to do that to mine. Have you by chance given it anything new in the last 2 weeks or so?

EDIT: And another odd thing was the ethanol didn't do that to all the leaves...just some.
 

az2000

Well-Known Member
I'm thinking pH-related calcium def (lockout). Overwatering or salt buildup, not enough runoff, not enough food (hungry?). It's hard to say without seeing the entire plant, the stage of growth, (knowing about the soil, what's being fed, etc.).

It looks Ca to me. But, has that odd look like it's related to something else.
 
Thank you for replies, sorry I was short on info, hope this helps.
Strain: Auto blackberry kush - dutch passion - just started week 8
Soil: FF ocean forrest
Nutes: FF grow big and tiger bloom - Only received 5 shots of grow big, half to full dose, so far 2 shots of tiger half dose
Water: tap water I let sit in a bucket overnight, ph around 7-7.5 I think, water every 2-3 days until saturation, but usually no runoff
Lights: 450 watt HPS plus 2 150 watt LED panels
Temps Humidity: 65-75 degrees, 35-65% humidity
Leaves affected: old and new

My best guess is that my tap water is probably too high pH, I have not been adjusting it. However, I've got 3 other (different) strains in the same room, same everything, and they are doing great, no signs of stress. I wonder if this strain is just more sensitive? Could the others be in danger as well? Could this be a disease and not a def? I fully saturate the pots when I water, but do not generate much runoff, could this be building up salts, even with my low fert use?

Thanks for your help guys! IMG_20151222_190918794.jpg IMG_20151222_190730154.jpg IMG_20151222_190803901.jpg IMG_20151222_190841600.jpg IMG_20151222_190918794.jpg
 

az2000

Well-Known Member
I think salt buildup. Probably overfeeding combined with not enough (none) runoff. I automatically default to this diagnosis in flower. But, it could also be too high bloom nutrients.

I would feed 1/2 strength with 100% runoff (flush) and let the soil dry completely, then feed 1/2 strength for awhile (with 20% runoff). If you watch your runoff PPMs they will may help you see salt buildup occur. That would have been useful to have right now. And, useful to know how much stronger you can go after doing 1/2 strength for a couple feedings. For me, 2500 is where I start having problems like you have. I start cutting back (and/or more runoff) around 2000ppm (0.5 hanna scale). I like to stay around 1600-1800.

You can enter what you've been feeding into this spreadsheet to see the actual NPK ratio you've been giving the plants. That's nice to know. Sometimes people feed inappropriately high PK (too soon, etc.) and don't know it. It is also good to know the ratio of what you feed because you can read your plants better, associating their condition with the NPK ratios you're using (not "this bottle, and that bottle."). You can adjust the ratios instead of following a rigid schedule. Or, substitute other products to get ratios which you know work.
 

tropicalcannabispatient

Well-Known Member
I think salt buildup. Probably overfeeding combined with not enough (none) runoff. I automatically default to this diagnosis in flower. But, it could also be too high bloom nutrients.

I would feed 1/2 strength with 100% runoff (flush) and let the soil dry completely, then feed 1/2 strength for awhile (with 20% runoff). If you watch your runoff PPMs they will may help you see salt buildup occur. That would have been useful to have right now. And, useful to know how much stronger you can go after doing 1/2 strength for a couple feedings. For me, 2500 is where I start having problems like you have. I start cutting back (and/or more runoff) around 2000ppm (0.5 hanna scale). I like to stay around 1600-1800.

You can enter what you've been feeding into this spreadsheet to see the actual NPK ratio you've been giving the plants. That's nice to know. Sometimes people feed inappropriately high PK (too soon, etc.) and don't know it. It is also good to know the ratio of what you feed because you can read your plants better, associating their condition with the NPK ratios you're using (not "this bottle, and that bottle."). You can adjust the ratios instead of following a rigid schedule. Or, substitute other products to get ratios which you know work.
Check your pm bro! im sorry for going off on u! I apologize sorry man, im very sorry!!
 

zippi563

Active Member
Thank you for replies, sorry I was short on info, hope this helps.
Strain: Auto blackberry kush - dutch passion - just started week 8
Soil: FF ocean forrest
Nutes: FF grow big and tiger bloom - Only received 5 shots of grow big, half to full dose, so far 2 shots of tiger half dose
Water: tap water I let sit in a bucket overnight, ph around 7-7.5 I think, water every 2-3 days until saturation, but usually no runoff
Lights: 450 watt HPS plus 2 150 watt LED panels
Temps Humidity: 65-75 degrees, 35-65% humidity
Leaves affected: old and new

My best guess is that my tap water is probably too high pH, I have not been adjusting it. However, I've got 3 other (different) strains in the same room, same everything, and they are doing great, no signs of stress. I wonder if this strain is just more sensitive? Could the others be in danger as well? Could this be a disease and not a def? I fully saturate the pots when I water, but do not generate much runoff, could this be building up salts, even with my low fert use?

Thanks for your help guys! View attachment 3570286 View attachment 3570287 View attachment 3570289 View attachment 3570291 View attachment 3570286
looks like over feeding. the leaves are cupping also
 
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