lower leaf damage to some plants, progresses from bottom up

[MoeBudz^420]

Hey, just wanted to post these up for any suggestions. I have 2 guesses for the lower leaf damage, either it's a lack of nutes and feeding uopn itself,

(was just upcanned to 2 gal from beercup, the new promix was wet with H2O only, so no nutes until that 1st watering dried out a bit. (3 days) They just got a good dose tonite.

Or, is it tmv? 3 plants in the space are affected, 2 are not. Same conditions for all. Affects lower leaves only.

Under approx 300W of CFL, 16/8, straight promix with higrow A+B grow nutes. PH is good, mid 6's, lights on - 23-25C, lights off 16-18C. Humidity low, 20-30%.

they are just beginning to show, and both fems I have ID'd so far are affected.

I could not find the chart, is it still used? here's the pix...

Edit: 1st pic groupshot, 2 fems are on the left. 2nd pic unaffected plant. 3rd pic, early damage. 4th, affected plant, 5th, damage has progressed.











Thanx for any suggestions...

Peace

 

[!!!]

It's definitely not TMV.

That looks like a Mg deficiency. Over time I began to notice that calmag and proper pH really do fix most problems.

I don't know anything about your nutes or what water you use though, and what's your pH?

Google Images "cannabis Mg deficiency"

 

[Rjstoner]

if it is mg problem u can use Sea Mag by humbolt nutrients

 

[laughingmoon]

I had this problem with FFOF. I never did solve it. I tried to manage pH, and did flush. Didn't have access to lime at the time.

 

[Rjstoner]

I had this problem with FFOF. I never did solve it. I tried to manage pH, and did flush. Didn't have access to lime at the time.

i hear of more people all the time who have trouble with that soil im betting its from a salt issue with the ocean floor + nutes causing lock out i dont know for sure i never use the brand

 

[MoeBudz^420]

Thanx for the replies, it was more curiosity than worry that drove this post.

!!! - I thought mag def was yellowing between the veins... But I did expect some deficiencies (multiple) from using just h20 instead of nute mix on the new promix, and thus they had nothing to eat for 4 days following upcan. Maybe the 3 affected are "hungrier" than the other 2...

Last year's were on the exact same schedule, and were happy as a clam (c99, AK). We'll see how they go now that they're getting fed again. promix BX is buffered with both dolomitic and calcitic limes.

I'm sure they'll be fine...

My nutes: A...



B...



Peace

 

[bililuv23]

Those leaves look very fimiliar as well as the pattern of your problem. I also thought it may had been PH or nute problems, as I hadn't had this issue until the temps got colder. Use a scope to check to see if you have a mold issue. My problem seemed to spread to a different plant and sure as shit, I found spores at the bottom of the dying leaves. I'm going to try a hydrogen peroxide solution and raise the temps in my room for a few days to see if this takes care of the problem. Good luck!

 

[northstate]

No TMV so thats good, my vote is acidic soil shocking the ph a bit plus they have not had a chance to use the nutes you applied yet. Should be good just dont over water them, add some cal/mag and feed constantly with pro-mix. Measure your runoff ph for definitive #'s. NS

 

[HUGE]

I ha the same looking issue in FFOF never figured it out switched to coco all problems gone.

 

[MoeBudz^420]

It was lack of food, causing cannabilizing of the lower leaves. Once I began watering with nute mix again after 4 days of drying out after the upcan, all was well. They went into 12/12 today.

Here they are... (the 3 females anyhow, 2 males destroyed)





Thanx again guys...


Peace