Rust spots on fans in veg

Dividedsky

Dividedsky

Well-Known Member
So some rust spots on my fan leaves just popped up on some of my white truffle cuts in veg- only them. This just happened in the last few days. I just recently switched to from vegging under t5s to led. Im using a growers choice 720w for veg in a 5x5 cranked down to 50%, the rust spots popped up when I cranked it up to 75%. Feeding has been on point...about 600-700 ppms so far. Rh% is at about 65% but could be jumping around a bit. Wondering if it because I cranked the gc 720w led up to 75% the other day is what caused this? Just too much intensity, because they seemed to be doing fine and had no issues at 50% so think I'll crank the dial back down. To me it does look like a sort of light burn from to much intensity, had the light about 25" away. Just wanted to get some of your thoughts. Other than that plants are healthy and happy, I'm taking cuts and moving them all into my sealed flower room with 6 of gc roi- 720w
20230420_141642.jpg20230420_142715.jpg
 
hotrodharley said:
Likely magnesium deficiency.
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Don't think it is...I'll try and take a better pic, close up it does look like some light burn. I'm feeding r/o water with 25 MLS of cal per 5 gals of r/o water...ph of 6.0...could be though, none of the other strains have it so.
 
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Dividedsky said:
So some rust spots on my fan leaves just popped up on some of my white truffle cuts in veg- only them. This just happened in the last few days. I just recently switched to from vegging under t5s to led. Im using a growers choice 720w for veg in a 5x5 cranked down to 50%, the rust spots popped up when I cranked it up to 75%. Feeding has been on point...about 600-700 ppms so far. Rh% is at about 65% but could be jumping around a bit. Wondering if it because I cranked the gc 720w led up to 75% the other day is what caused this? Just too much intensity, because they seemed to be doing fine and had no issues at 50% so think I'll crank the dial back down. To me it does look like a sort of light burn from to much intensity, had the light about 25" away. Just wanted to get some of your thoughts. Other than that plants are healthy and happy, I'm taking cuts and moving them all into my sealed flower room with 6 of gc roi- 720w
View attachment 5283425View attachment 5283426
Click to expand...

How much water, how often? Look like 5 gal pots?

To me that is a sign of sudden pH swings. Either by drying out too much or not balancing the pH of the feed correctly
 
Nutty sKunK said:
How much water, how often? Look like 5 gal pots?

To me that is a sign of sudden pH swings. Either by drying out too much or not balancing the pH of the feed correctly
Click to expand...

Ya they're cheap 5 gal fabric pots. I transplanted into them not too long ago so was only using like half gal of water or a bit more till the roots stretched out, so they probably did dry out a bit, not to bad though. Now plants are bigger I'll be watering ever 2 to 3 days or so...been doing feed, feed, feed, water, keeping my ec at a steady and not too high #.
I'm getting used to the leds in veg, always ran t5s for veg but with electic cost they just don't make sense, when all my veg spots were up and running I was using anywhere from about 1500w to almost 2000w in t5s just for veg.

I love the leds so far in flower last run came out great and got some killer yields. Running the led in sealed room with co2 for flower.
 
I was gonna say calcium deficiency but calcium is an immobile nutrient meaning you'd first see it at the top, , and heat burn would most likely show up at the top vs the bottom (or would it?) only thing else from the bottom looking like that (or similar) would be magnesium deficiency. The new light intensity most likely speed up the nutrient uptake of your plants and as mentioned here already, probably just a little nute burn. Plants looking super otherwise. (Might want to get them on pot risers so they're not sitting in their own piss after the runoff)
 
Week4@inCharge said:
I was gonna say calcium deficiency but calcium is an immobile nutrient meaning you'd first see it at the top, , and heat burn would most likely show up at the top vs the bottom (or would it?) only thing else from the bottom looking like that (or similar) would be magnesium deficiency. The new light intensity most likely speed up the nutrient uptake of your plants and as mentioned here already, probably just a little nute burn. Plants looking super otherwise. (Might want to get them on pot risers so they're not sitting in their own piss after the runoff)
Click to expand...
I haven't been watering to runoff with these plants so far and when I do I shop vac the runoff out of the plant trays.. I never let plants sit in runoff, I always dump out or wet vac out. I think I could be having a bit nute burn since cranking up the intensity, and feeding a few times in a row, I'll feed next just straight r/o water with a bit of cal mag and test runoff. The gary payton and jealousy I have don't have it and look fine.
 
StoneDHedgE said:
To me it looks like an over fertilized issue. Not bad. Looks like it got too dry after a feed. Carry on as usual.
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Ya you're right, now that I think of it I was hearing the gorilla butter (white truffle cut) is a bit nute sensitive and finicky, I'll probably lower my ec and cut back feeding a bit. I thought it might be the lights burning a bit of water perspiration of the fans leaves

Here's the gary payton which looks good-
20230420_204559.jpg
20230420_205036.jpg
 
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Dividedsky said:
I haven't been watering to runoff with these plants so far and when I do I shop vac the runoff out of the plant trays.. I never let plants sit in runoff, I always dump out or wet vac out. I think I could be having a bit nute burn since cranking up the intensity, and feeding a few times in a row, I'll feed next just straight r/o water with a bit of cal mag and test runoff. The gary payton and jealousy I have don't have it and look fine.
Click to expand...
There's no one recipe that fits all plants, have to adjust to each their own... as your finding out. Gary Payton..heck ya, following to see this one play out.
 
Dividedsky said:
Ya you're right, now that I think of it I was hearing the gorilla butter (white truffle cut) is a bit nute sensitive and finicky, I'll probably lower my ec and cut back feeding a bit. I thought it might be the lights burning a bit of water perspiration of the fans leaves

Here's the gary payton which looks good-
View attachment 5283508
View attachment 5283509
Click to expand...
Got a Grimm Truffles just starting to flower. Seems to be a medium feeder. Super lush and vigorous. So smelly already. 20230420_195712.jpg
 
Dividedsky said:
Ya they're cheap 5 gal fabric pots. I transplanted into them not too long ago so was only using like half gal of water or a bit more till the roots stretched out, so they probably did dry out a bit, not to bad though. Now plants are bigger I'll be watering ever 2 to 3 days or so...been doing feed, feed, feed, water, keeping my ec at a steady and not too high #.
I'm getting used to the leds in veg, always ran t5s for veg but with electic cost they just don't make sense, when all my veg spots were up and running I was using anywhere from about 1500w to almost 2000w in t5s just for veg.

I love the leds so far in flower last run came out great and got some killer yields. Running the led in sealed room with co2 for flower.
Click to expand...

Could be from transplant… the core does dry faster than the new soil around it which can cause moisture stress. Id just keep an eye on it as it’s probably an isolated event.

If it keeps spreading after watering more and more frequently then something else is up
 
Dividedsky said:
So some rust spots on my fan leaves just popped up on some of my white truffle cuts in veg- only them. This just happened in the last few days. I just recently switched to from vegging under t5s to led. Im using a growers choice 720w for veg in a 5x5 cranked down to 50%, the rust spots popped up when I cranked it up to 75%. Feeding has been on point...about 600-700 ppms so far. Rh% is at about 65% but could be jumping around a bit. Wondering if it because I cranked the gc 720w led up to 75% the other day is what caused this? Just too much intensity, because they seemed to be doing fine and had no issues at 50% so think I'll crank the dial back down. To me it does look like a sort of light burn from to much intensity, had the light about 25" away. Just wanted to get some of your thoughts. Other than that plants are healthy and happy, I'm taking cuts and moving them all into my sealed flower room with 6 of gc roi- 720w
View attachment 5283425View attachment 5283426
Click to expand...

Yo I’m having this same issue with certain strains after switching to LED. I kind of think it’s nute burn? But It doesn’t happen with the same feeding on the same cut under HPS
 
Its the lighting change. You had it correct.
Happens to really sensitive bitches when I move them from 400w mh to 1k hps. And only on the biggest upper leaves.
They adjust fast and damage only occurs from the first day of really heavy light.
Sensitive beeyotches.
 
I figured out that like the above guy said it’s the stronger lights, but also I noticed that I have to keep the medium saturated under the LED because as soon as my soil even gets a tad bit dry I start seeing the bleaching and what looks like calcium deficiency so watering every 2-3 days seems to be helping
 
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