Weird Leaf Discoloration. Ideas on Culprit?

[YoungKelly]

I have 3 Blue Dreams going right now, and 1 of 3 is starting to look alittle funky. The other two are completely healthy.

I had recently watered each with
-2tsp FF Grow Big.
-2tsp FF Tiger Bloom
-1tsp CAL-MAG plus
-Ph'ed to 6.5 or thereabouts.

I've included pictures the main symptoms are: Clawing Leaf Tips, Purplish-Rusty colored discoloration affecting leaf tips and edges first than moving inwards towards stem.

Temps are around 82F and humidity around 64. Any help is greatly appreciated!

 

[smokebros]

Can you take a photo without the blurple light? Also can you take a picture of your other plants that are healthy? And also pan out a bit so we can see the whole plant & soil, etc.

 

[stoned-monkey]

agree with needing better pics. but are you in flower or veg? soil or coco or hydro? how big if containers? how far are your lights? what lights are you running? I know lots of questions but problem could be a lot of different things, why you're here asking right. plus just throwing nutes at it could make things worse.

 

[YoungKelly]

Hey All, Sorry for late reply. So I got a couple more pictures under a flashlight, as there are no wired lights to illuminate greatly (I hope they help)
Some more info:
-3 weeks into flower
-Soil Grow FFOF and some EcoScraps soil that has been working great.
-145w LED (300w equivalent)
-Lights about 16 inches away.
-5 gallon fabric pots.

Everything was fine until I watered them again. The next day the problem appeared in only that specific plant. I had done some defoliation a couple days prior (nebula haze guide) to the problem appearing, however I had done the same with the other two plants and they are as healthy as can be.

 

[YoungKelly]

I did have a small (3-4 inch fan) that was closest to the problem plant, but I don't think it was too intense... I don't think they are wind burned. I now have a larger fan blowing away from them off the wall to provide airflow.

 

[propertyoftheUS]

Have u flushed them recently? Might be a salt build up

 

[tiltswitch]

it's difficult to say, I can see a few different issues, on one pic it looks like you've got a fried leaf at the end, a few things cause that , led too low, underwatered, over nuted. Sometimes when you first give cal/mag it starts problems with salt buildup like above post. Try and think what you did differently when you watered that to the others,how often do you water/feed

 

[YoungKelly]

it's difficult to say, I can see a few different issues, on one pic it looks like you've got a fried leaf at the end, a few things cause that , led too low, underwatered, over nuted. Sometimes when you first give cal/mag it starts problems with salt buildup like above post. Try and think what you did differently when you watered that to the others,how often do you water/feed

I usually feed with the FF twice a week. Should I feed only once, than just water with plain ph'ed water the second time? And if I do use plain water, should I add Cal-Mag?

 

[tiltswitch]

Only twice a week? I'd say that it's probably not salt build up now, unless your ph has been way off. I don't like powdered nutes so I'm not well informed on the dosages and how they sit , maybe hang on until someone who has used powdered nutes , I know they can be a lot stronger than liquid nutes even when following equivalents I. E. Big bud powder is notably stronger than its liquid equivalent measure (or uptake is better). If in doubt,and no help, flush and re nute with cal mag, grow bloom and try maybe to get a micro or uptake nute ,bio heaven is good, once a week and a bloom booster wouldn't hurt like big bud or their equivalents. Looks like over nuting in some pics , you may do more damage trying to fix it, so on the safe side flush and do half strength nutes with full cal/mag and go from there. About feeding , like I say I'm not too up on powdered nutes, and only feeding once a week instead I wouldn't like to say do it, my only advice if nobody else can help you is to flush that plant.

 

[YoungKelly]

Only twice a week? I'd say that it's probably not salt build up now, unless your ph has been way off. I don't like powdered nutes so I'm not well informed on the dosages and how they sit , maybe hang on until someone who has used powdered nutes , I know they can be a lot stronger than liquid nutes even when following equivalents I. E. Big bud powder is notably stronger than its liquid equivalent measure (or uptake is better). If in doubt,and no help, flush and re nute with cal mag, grow bloom and try maybe to get a micro or uptake nute ,bio heaven is good, once a week and a bloom booster wouldn't hurt like big bud or their equivalents. Looks like over nuting in some pics , you may do more damage trying to fix it, so on the safe side flush and do half strength nutes with full cal/mag and go from there. About feeding , like I say I'm not too up on powdered nutes, and only feeding once a week instead I wouldn't like to say do it, my only advice if nobody else can help you is to flush that plant.

I use the liquid Fox Farm nutes. I agree about a possible overabundance of nutes... it only started after I watered with them. The soil is still damp, I'm afraid of overwatering if I flush. Thanks for all your help. It's highly appreciated!

 

[rollangrow]

Looks like a ph problem to me, the leaf on the right matches yours but i could be wrong. Also looks like possible wind burn since they are starting to claw downward, are the problem leaves only on the side the fan was?

 

[tiltswitch]

Ah I understand now. When you said 2tbs I thought you were using powdered nutes. Better using a measuring cylinder and knowing exactly your amounts. It's going to be hard to give exactly half a tbs for example. id be suprised if it's ph, you would usually have the issue with all your plants, but, it might be a finicky strain so check your meter calibration. Above poster was right about checking if the leaves are only damaged where the fan was blowing etc. As for flushing , how big are your pots again and how many lts do you give them?

 

[Rikyu]

I see you listed a Ca/Mg supplement, but this does look similar to a Calcium deficiency. Cal/Mag deficiencies are usually caused by pH fluctuations, as rollangrow said, it looks like a pH problem. However, the pH could be fine even with a deficiency. Do you have a soil pH meter? They're pretty cheap.

 

[Beachwalker]

Op said his pH was "6.5 or thereabouts" I don't understand what 'or thereabouts' means?

..are you measuring pH or not op, cuz I agree with above poster, looks like cal/mag issue and if your supplementing then maybe your pH is it locking out, also PPM would help

 

[Roger A. Shrubber]

its not a cal-mag deficiency. calcium and magnesium are two separate nutrients. do not treat them like they're one thing, just because that's how a lot of companies package it.
that's over watering, over feeding, and not ph'ing. you have a calcium deficiency, probably caused by your soil being too wet, and your feed not being in the proper ph range.

 

[YoungKelly]

its not a cal-mag deficiency. calcium and magnesium are two separate nutrients. do not treat them like they're one thing, just because that's how a lot of companies package it.
that's over watering, over feeding, and not ph'ing. you have a calcium deficiency, probably caused by your soil being too wet, and your feed not being in the proper ph range.

Today is watering day, what should I do to correct the problem?

 

[YoungKelly]

Thank you all so much for the help!

 

[YoungKelly]

Op said his pH was "6.5 or thereabouts" I don't understand what 'or thereabouts' means?

..are you measuring pH or not op, cuz I agree with above poster, looks like cal/mag issue and if your supplementing then maybe your pH is it locking out, also PPM would help

I don't have PPM, however by "thereabouts" I mean that when I ph the water its in a 6.4-6.5 range, so I wasn't sure exactly what it's at.

 

[Roger A. Shrubber]

Today is watering day, what should I do to correct the problem?

don't water on a schedule, water when the plants need watering. if they feel like they need watering today, do it, then wait till they dry out good before you water again. over watering isn't necessarily too much water at one time, it can be watering the right amount too often.as a matter of fact, i'd water each time till i got a little run off, to avoid salt build up. then let them dry out till you can stick your finger in all the way and it feels dry. i actually use the weight of my pots, but you have to learn what they feel like very dry first

 

[Rikyu]

its not a cal-mag deficiency. calcium and magnesium are two separate nutrients. do not treat them like they're one thing, just because that's how a lot of companies package it.
that's over watering, over feeding, and not ph'ing. you have a calcium deficiency, probably caused by your soil being too wet, and your feed not being in the proper ph range.

Hence the use of two separate element symbols, Ca and Mg. They're paired because they fundamentally complement one another, both being alkaline earth metals and functioning as electrolytes.