Need Help Guys. Lemon Kush, brown, necrotic spots on fan leaves.

What's going on everyone? Hope all is well. I have been a member on here for around a year but just recently switched to a different user name. I just harvested 6 girls out of my "big room" and I received a Lemon Kush cut from a friend with no real intention of it making it very far. I threw it in my closet, with no intake or outtake for air, so I am manually refreshing the air and am using a 90W Taotronics LED UFO (135W theoretical) and 8x 26w 2700k CFL's for supplemental lighting. I wanted to try to keep the plant small so I left it in a 2 gallon pot, but of course she still stretched out to around 4' So I am currently 24 days into flower and I am seeing the exact same problem that plagued my last grow. About a week into flower, the big fan leaves started yellowing a little bit and then started forming these brown, necrotic looking spots. I have only fed this plant three times, using Sensi Bloom A & B, Big Bud, and Bud Candy (also used Voodoo Juice and Piranha in veg). Anyways, it started about half way up the plant and has gradually been working it's way up. The newest growth around the apical bud doesn't have the spots yet, but once the growth gets a little older it could develop them. The last feeding I added some CalMag+ to my nutrient solution and went a little heavier on the Sensi Bloom Part A (nitrogen and calcium pretty much). I really don't know if it has helped yet but I just wanted to ask you guys to start tossing some ideas around. If I need to, I will flush it soon. The newest growth was a little droopy today too, not sticking up at 45 degree angle like normal, not sure what was going on with that. My temps at night are around 65 F and during lights on they swing between 73-75 F, humidity is pretty consistent around 50-55% RH. Here are some pics though, the first pic is from 4 days ago, so you can sort of see the progression of what is happening. It is mainly affecting the fan leaves. Thanks very much for the help guys, +rep for any and all help fellas!

4 Days ago...


Pics From Today....

You have a Cal/Mag deficiency. That's what the punctate rust spots in the middle mean. I use Botanicare Cal/Mag with Fe and am very pleased with it.

Your doing the right things to fix the issue, just figure out what strength the calmag should be at and you'll be fine. Next time mix in dolomite lime with your soil and you won't need to buy the calmag which cost more.

Yeah, once I get the clone and transplanted into the two Gallon pot, I mixed in dolomite with FFOF. The guy who gave it to me has used Miracle Gro for 8 years and won't switch, you can't tell him anything. I got as much of it off the rootball as possible. I have Botanicares CalMag+ as well, my friend gave me a bottle of Advanced Nutrients Revive. Do you guys think I should give that a try today or just stick with the calmag? The Revive looks good on paper... I'll spread some rep around when I get home from work today. Thanks very much guys, I really appreciate it! Will keep everyone updated.

curious2garden said:

You have a Cal/Mag deficiency. That's what the punctate rust spots in the middle mean. I use Botanicare Cal/Mag with Fe and am very pleased with it.

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Quick diagnosis! I just went to re read the diagnosis thread and i find it's difficult to diagnose more than one problem at once.

calcium - dark green inside with a yellow edges of leaf
mg - usually starts at the bottom of plant and works it's way to the top characterized by dark green veins, some yellowing, with rusty crispy edges on leaf

Karma0413 said:

Quick diagnosis! I just went to re read the diagnosis thread and i find it's difficult to diagnose more than one problem at once.

calcium - dark green inside with a yellow edges of leaf
mg - usually starts at the bottom of plant and works it's way to the top characterized by dark green veins, some yellowing, with rusty crispy edges on leaf

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Then hopefully the OP won't listen to me and his crop won't look like mine and you will have saved him from a fate worse than death LOL GREAT JOB

Haha. Nice looking girls man, what strain(s) are you running? I think I'm going to try out AN 's Revive today, any thoughts on that? I had this same problem with my Skunk #1's last run, however I also had 3x NL' s in the same room and they were perfect, never had a single problem. Will update soon and spread some +Rep around when I get off work. Thanks for the help guys, I was thinking Ca def but just wanted to verify. Thanks again!

the818CaliMan said:

Haha. Nice looking girls man, what strain(s) are you running? I think I'm going to try out AN 's Revive today, any thoughts on that? I had this same problem with my Skunk #1's last run, however I also had 3x NL' s in the same room and they were perfect, never had a single problem. Will update soon and spread some +Rep around when I get off work. Thanks for the help guys, I was thinking Ca def but just wanted to verify. Thanks again!

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It's Annie! I know you... but can't remember your old name. I am such a stoner, sorry, but we've spoken. Those in the top photo are Cindy 99's. They are notoriously hungry. My DNA Pure Afghan and CBD Crew outdoor mix are in my second tent. I'm having to run separate res' for them as what barely satisfies my Cindy's was burning my CBD's and Afghan.

Anyway I'd mix up some botanicare Cal/Mag with Fe, 3 ml/gallon and give them each a nice long gulp. Can't hurt anything.

Keep it simple and stick with the cal mag until you can fix these issues.

The container looks tiny. Why haven't you transplanted up?

It's a 2 gallon container, I purposely left it in a smaller pot to see if I could keep it smaller because I never tried, I normally flower in 5-7 gal pots, just wanted to see if a 2 gal pot would help me keep it small. It is in my closet, haha. This is been more of a side project, I am not depending on this one plant to produce my medicine for me, just an experiment. A friend kept bugging me about this LK cut he wanted to give me, so I finally took it from him and threw it in my closet just to see what I can do under really shitty conditions pretty much. I would love to harvest something off of her, but if she doesn't make it, it's no big deal.

Anyways.... A little two day update. I water/feed with about 5/8 gal of water, which is about how much it takes to get 10% runoff, so yesterday I fed with 5/8 gal distilled water (starting at 0ppm), I added 3mL of Botanicare CalMag+ and then 10mL of Advanced Nutrients Revive (they say to use 5mL/L to correct nutrient defs, the analysis for Revive is.... Nitrogen - 1% (Urea N = 0.4%, Nitrate N = 0.6%), Water Soluble Calcium = 1%, Water Soluble Magnesium = 0.5%, and Chelated Iron = 0.3%. So they should have received a pretty healthy dose of these nutrients, I believe there are a few other micro/macronutrients according to AN's website, but I cannot verify those claims. However this solution only put my total TDS readings at 298ppm (NaCl) or 578uS. Which does seem a tad bit low to me...
Today the spots are still spreading pretty bad, most of the leaves have been affected somewhat, the newest sugar leaves on the apical bud are clear, but it seems to take a day or so for the spots to reach that newest growth anyways, hopefully I will see some improvements in the coming days. I have heard of a few strains becoming major calcium hogs around week 3-4 flower (think : the REAL chem strains), so I'm thinking that may be it, because I have not fed it enough to accumulate any real salt build up I don't think. If anyone else has any comments or advice, all is welcome. I would like to discover a solid solution to this problem before I break out my Cali Conneciton and Reserva Privada strains for next year. Thanks very much brothers!

I'm posting new pictures soon so stay tuned! Thanks brothers