Taco leaf causes - not humidity or temp or ph

Macncheesehaze

Well-Known Member
I have one gg # 4 and it’s tacoing upward on a few leaves. It just started happening today I haven’t had to water in a few days because my soil holds water a little too well. I’m guessing too much love?
 

ubluntu

Active Member
I’m having the same problem. Doubt it’s heat or temp. Possibly wind blown or too many nutes
That kind of looks like a brutal Calcium deficinecy and/or major root issue.
OP's later pics show clear signs of light/heat stress. Possibly triggered by inadiquete nutrient/water uptake and accessive transpiration.
 

Zyzyx

Active Member
Okay so I've got pics with an update. 2 of the 3 plants are doing MUCH better. I still don't think this is light stress as even the lower leaves (under shade from above) have the taco/twist/curl going. One other interesting effect is that these buckets take significantly less water than the other 33 in the garden. They start start spilling water out the drain holes at 1/2 gallon while the other 33 buckets take 1 to 1.2 gallons without much dripping. Does this mean there are more or less roots in these 3?

So to recap, we flushed with regular water after the severe tacoing, and then skipped every 3rd nutrient feeding in favor of straight water and additionally stopped using RO water in favor of tap water ph'd down to appropriate levels. This is because the tap water has some minerals in it that RO does not.
 

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kmog33

Well-Known Member
Okay so I've got pics with an update. 2 of the 3 plants are doing MUCH better. I still don't think this is light stress as even the lower leaves (under shade from above) have the taco/twist/curl going. One other interesting effect is that these buckets take significantly less water than the other 33 in the garden. They start start spilling water out the drain holes at 1/2 gallon while the other 33 buckets take 1 to 1.2 gallons without much dripping. Does this mean there are more or less roots in these 3?

So to recap, we flushed with regular water after the severe tacoing, and then skipped every 3rd nutrient feeding in favor of straight water and additionally stopped using RO water in favor of tap water ph'd down to appropriate levels. This is because the tap water has some minerals in it that RO does not.
There’s definitely some nutrient lockout or imbalance going on, not crazy but I would say it’s more than just light saturation. If you’re not currently giving them straight water, it may be worth flushing out the soil to get rid of any residual salt buildup.

Also what’s your light schedule? It almost looks like it’s revegging in parts or just really stressed(which could still be a nutrient or ph issue), but if your timer went off in the middle of a light cycle or something or there are a lot of light leaks during the dark period that might explain it
 

LarsVegasNirvana

Well-Known Member
You might have root rot. It causes brown splotches kind of randomly. Less root mass means less water can be delivered to the leaves. The lack of water supply makes the leaves taco to absorb less light and slow down their transpiration needs.
 

DoubleAtotheRON

Well-Known Member
I had the same problem this round... found out that after @Renfro advised me to get a proper PH pen, it was PH lockout. I fed at ~7 PH mix, but that wasn't enough. After I got an Apera PH meter, I found out that the soil was actually at 5.1 Run off, slurry tests are useless. We had to feed in at as much as 11.5 PH mix to get it to settle at ~6.7ish. It takes a lot to get it to settle. After we did this, things bounced back like nobody's biz, and it saved our crop for sure. We had 122 plants doing the same thing. I can almost guarantee your true PH is in the low 5's. If you do have an Apera or Hanna meter, I stand corrected, but it looked exactly like this.
 
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Renfro

Well-Known Member
So what other reasons are there for leaves to taco?
Anything that might also cause plants to stop drinking as much water?
Know that as plants go thru flower they drink differently. First 20 days or so it's business as usual. Then they speed way up for about 30 days. Then finally they slow way down for ripening say 20 days. Thats based on several 70 day ish strains.

A really low pH in the media will also slow growth to a crawl and therefore transpiration.
 

Renfro

Well-Known Member
 

Zyzyx

Active Member
Thanks for the info. So how can I tell the difference between Ph and True Ph? I’m putting nute water in at 6.5 and runoff is also at 6.5.
 
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