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Taco Leafs - Don't Know Why

epicseeds

epicseeds

Member
I can't wrap my head around why this particular plant is showing taco leafs. Temps are at 74F at the highest point of the plant. The other plant to the right of it is much taller, and is showing no signs of taco leafs. Granted, the two are different strain (problem plant is kandy kush). The problem only is happening to the top part of the plant.

W8t0V.jpg





qEVvz.jpg

I always thought tacoing was the cause of high temp, is there another reason?

These are all in coco and are being fed with:

10ml PBP grow
10ml liquid karma
2ml silica blast
PH @ 5.8
Tap Water

Only thing i can think of being out of line is that i am not using calmag with the coco. Since i was using tap water i didnt think i would need to. Is this a correct assumption?
 
T

thesloppy

Off the top of my head the yellowing of the leaves with green veins, starting at the top of the plant, says magnesium deficiency to me. Backed up by the fact that you're growing in coco (which can be finicky about cal/mag), and not using a cal/mag supplement. I will occasionally see less severe yellowing/curling on plants late in flower when I'm not paying too much attention. I think you're on the right path.
 
epicseeds

epicseeds

Member
The picture makes them look a lot more yellow than they really are. I would say in reality they have a perfect shade of green actually. Perhaps I will get some calmag though and see what happens.
 
epicseeds

epicseeds

Member
Well, ive been using CalMag for a few weeks now and they are still taco'ing. Ive concluded its definitely not from calmag. Im wondering if it may be a finicky strain. It is Kandy Kush by reserva privada. Anyone know if this plant dislikes certain things?
 
shawkmon

shawkmon

Pleasantly dissociated
Veteran
ive had some plants just have leaves like that , some sd crosses that actualy reverse taco and droop over like somethings wrong when there isnt, i had a couple grape krush crosses that had a weird taco thing and it stayed like that the whole life and plant was killer and huge yeilder, my advice is keep things simple and less is more, people seem to complicate things , seed , dirt, water , light , pow, no need for all this fancy stuff
 
M

massivecalyx

Member
I have a KK + skunk cross that is doing the same exact thing while the other strains in my garden are perfectly fine. Last run I did not have this problem though.
 
S

staff11

Love2herb said:
Looks like a mosaic virus to me, but I'm sure a bunch of people will tell me how wrong I am.
Click to expand...

You are wrong. LOL

Sorry man I couldn't resist. But it's not TMV.... Looks like heat stress, but as others have pointed out I have had some strains just do this.

Sleestack x Skunk for one, and mainly some of my older skunk #1 crosses...
 
Snow Crash

Snow Crash

Active member
Veteran
I found my Kandy Kush x Skunk plants needed a little extra potassium. I'd cut the temps first and increase the potassium ratio if the heat/humidity/VPD wasn't an issue.
 
LittleAmsterdam

LittleAmsterdam

Member
HEAT ! Some how they got cooked. You said only the top leaves are 'Taco'. I would top just below the last Taco leaf. The burnt leaves won't come back and eventually will die.
 
mysophilia

mysophilia

Member
Its your plants telling you that you need Calicum.. I also see some purpling in the stalks, thats another sign of your plant telling ya you will need to add more P too.. What I would do first is add cal first feeding, then do a mag ( epsom salt ) next feeding.. This way the 3rd feeding ya ready to add some P since ya got a fresh source of mag in the plant. ( Make sure ya do equal amounts of cal/mag so ya dont create a bigger problem later down the road with some 2ndarys locking out..)
 
N

narko

LittleAmsterdam said:
HEAT ! Some how they got cooked. You said only the top leaves are 'Taco'. I would top just below the last Taco leaf. The burnt leaves won't come back and eventually will die.
Click to expand...



wtf is wrong with people? stop giving out solutons if you don´t have none. why would he cut off leaves which are just fine in like one or 2 days ? they will not die in case thy eat is really is the problem causing taco leaves. i think it looks more like a starting cal deficiency. good luck finding the probs.
 
Snow Crash

Snow Crash

Active member
Veteran
LOL... Calcium deficiency...

It's like people just give names to symptoms regardless of what the symptoms look like. This is most definitely not calcium deficiency. It resembles literally none of the symptoms.

Calcium

Calcium plays an important role in maintaining cell integrity and membrane permeability.

Calcium Deficiency

Young leaves are affected first and become small and distorted or chlorotic with irregular margins, spotting or necrotic areas. Bud development is inhibited, blossom end rot and internal decay may also occur and root may be under developed or die back. Deficiency will cause root tip die-back, leaf tip curl and marginal necrosis and chlorosis primarily in younger leaves. Symptoms: young leaves develop chlorosis and distortion such as crinkling, dwarfing, developing a strap-like shape, shoots stop growing and thicken.

Calcium Toxicity

Difficult to distinguish visually. May precipitate with sulfur in solution and cause clouding or residue in tank. Excess calcium may produce deficiencies in magnesium and potassium.
Click to expand...

Potassium (K)

Potassium is involved in maintaining the water status of the plant and the tugor pressure of it's cells and the opening and closing of the stomata. Potassium is required in the accumulation and translocation of carbohydrates. Lack of potassium will reduce yield and quality.

Potassium deficiency (K).

Older leaves are initially chlorotic but soon develop dark necrotic lesions (dead tissue). First apparent on the tips and margins of the leaves. Stem and branches may become weak and easily broken, the plant may also stretch. The plant will become susceptible to disease and toxicity. In addition to appearing to look like iron deficiency, the tips of the leaves curl and the edges burn and die.
Click to expand...

Notice I want to draw extra attention to this: "the tips of the leaves curl and the edges burn and die."

Sound familiar? It should.

Potassium is critical to the movement of water for transpiration and the opening/closing of stomata. Often times increased heat will increase the need for more transpiration and respiration, which all falls on the back of potassium. If there was any single element that helped plants deal with heat it would be Potassium.

Again, I just have to LOL at calcium deficiency. Do your homework before you go misleading other growers.

Also, purple stems indicate nothing more than a little stress. Some strains are genetically just purple. This is not something you can key off of to use as a reactionary tool. Focus on dealing with the heat first, then Potassium second. Obviously something is amiss here, so go back to basics (environment 101) and hit your plants with a balanced nutrient ratio. Not much else you'd need to do, a little leaf curl won't hurt so long as you get it under control soon.
 
M

majortom9

Member
potassium

potassium

Looks like potassium, but not a deficiency. Looks more like toxicity. If the leafs are showing light colored interveinal scorching more than likely that is the problem. If it was magnesium, the interveinal discoloration would be clorosis or light in color without the scorching, but if its a potassium toxicity they interveinal regions will have a burnt scorched kind of dirty look and an overall light green color. The two look alot alike. If you think it may be toxicity just flush a couple times. :wave:
 
K

Kushy

Member
My plants are doing the same thing. They did it from seed in soil and the clones are now doing it in hydro. I believe its strain. Funny thing is most people on here that said they had it happen seems like kush strains. Im running cvk. I say strain.
 
W

WPA

Member
I actually had a chemdawg do this and i'm pretty sure it was just the strain. Every other strain in the garden was just fine. I was using a coco/ffof mix with the full AN sensi line up.

In the end it turned out pretty nice, I would just say dont try too much and stress it out, keep the nutrients simple and let it do its thing... that is unless it starts to get worse. In that case you already know to post back here with updates!

Hope every thing turns out for some killer herb in the end!!!
 
N

navyguy14420

Member
Did the problem ever get fixed? I'm seeing a similar issue with mine. I'm growing outdoors in foxfarm soil with only foxfarm grow big nutes. They've been in the ground about 5-6 weeks. Got them as clones and they started to flower about 2 weeks after I put them in the ground. They were cloned in 18/6 light cycle and the odd weather for this time of year around my parts sent them into flower. Anyhow, they are (so I'm told) fire OG kush. the last couple days the temp around here shot up from the the 60's to high 80's to low 90's. I've been seeing taco leaf on the top 10-20% for the last couple days since the temp shot up. other than the taco leaf, the plants look just fine. after looking for other threads about taco leaf, it seems the strain is what they all have in common. And maybe they are a little more heat sensitive than other strains. I'm gonna start adding a little micro nutes and some bloom nutes to get these things more of what they need. I know I'm slacking on the nutes but they are not showing any signs of sickness at all, besides the taco leaf. Hope this helps. Just my two cents for what it's worth.
 
Yeti

Yeti

Active member
I know it is a cause of major discussion, but I did many hours of research and experimentation in regard to this issue last year, and am curious why everyone is so convinced it is not TMV. That was the most common response to this issue I have found and it appears to be genetic. Which viral symptoms would show through generations. I had a Cindy99 as well as Third dimension express this, though I believe my blackberry kush, deep chunk or Lapis Mtn Indica would have shown heat stress earlier grown outdoors in 85-90 degree average temperatures. My old lady took care of them for a bit early on and used her standard tobacco tea to take care of the aphids while the plants were youngsters. I did pull the plants due to finding TMV as the most likely cause and they truly didn't have the vigor as vegetation continued that the others had shown, while before showing curl they grew at the same rate. I had played with Cal and Mag and there were no other symptoms of sufficiency or deficiency nor pH related problems other than leaf curl. I did allow it to grow through veg with the others but was taking space in the holes and eventually culled the weirdos as they had only gotten weirder as the symptoms travelled throughout the remainder of the plant.
Also, completely different from a thai expression which is the opposite taco facing downward.

I would say grow them and find out. You can't get TMV from them... so nothing to worry of on your end. Good luck.

Yeti
 
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