heat stress causing a potassium def?

whaddup guys, I made a thread about a week ago right after I noticed I had some heat stress on one of my girls. It got up to 105 here and it really did one of my girls no good. I saw some curled up leafs in various spots but it was already too late to do anything about it. I cant move my plants and I cant really get them into any shade so they have to remain where they are.

Anyways, I figure I would just treat it as best as I could and let nature do its thing. today I noticed that a lot of the leaves that had the curled up effect started showing spots.



Now my thinking is that the plants are trying to recover from the heat stress and its using up whatever potassium it has and the burned leaves just are dieing off. Reason being is I'm not seeing any of these "spots" on any of the new growth that would tell me its a deficiency.

does anyone else have some suggestions as to what else this could be? They're growing in super soil and I had no problems up until the one hot day I had. All my other plants are doing great besides the ones that had a few burnt leafs.

IMO looks like nute burn. Not a def.

In times of high heat plants will use more water than nutes and with a supersoil recipe you don't have the option of using plain water for a few days.


Should be fine just watch for it getting any worse.




J

Agreed.
And my Supersoils get nothing but water most of the time......so I don't understand that one Jond.

Dr. Who said:

Agreed.
And my Supersoils get nothing but water most of the time......so I don't understand that one Jond.

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I mean as you would when supplementing your soil with water mixed base nutes.

Water water feed. In this instance everything is already there so you can't eleviate any of the nutes.

I know supersoil is water only. (Even though I'm a soiless guy )



J

im really not sure if it is nute burn. for instance the plant I pulled those leaves off of had no problems what so ever until It got 105 one day. I knew it was going to be hot so i watered in the morning and once again at night. I noticed the heat stress on my daily afternoon check. I really think its a sign of a leaf sucking itself dry because where the burn marks are on the leaves is actually where I noticed the heat stress the day it happened.

However I did have some nute burn on 2-3 of my girls but it wasnt until after I fed them some teas. I didnt dilute them and just got a little burnt but they recovered from it, just a few burnt edges but nothing worth pulling the leaves off.

Im just looking to see if my way of thinking this through is correct and if anyone backs my thoughts lol. If not, then Ill need to start thinking of a way how to get thru it. Right now im just watching it every day and if it gets worse and on new leafs then I know something is wrong.

Did you put fertilizer spikes in your pots? I've seen some leaf burning from giving back to back deep soaks when spikes are in -easy to in hot conditions when you have to water more aggressively. Just a thought.

In hot temp conditions the plant will use more water and that gives way to more nutrient uptake. Even if not wanted.
The plant (at 90F and above) quit actual growth for the most part and expends it's available energy on attempting to stay cool.
Even brief periods of high temps can start a small burn. It begins by "looking" like heat stress and goes quickly into a burn...

Watering with straight pHed water for a time will in short order correct this problem.
Straight water for a week and resume feeding.....continued feeding without reducing the available nutrients in the plant/soil will bring on more problems later...

any ideas on how i should lower my ph in a 285 gallon water tote? lol. i mean I really cant afford to throw a bunch of ph down in there and then have it drop wayyyyy down. would be a waste of water.

Now hear me out here on this before u guys think im crazy lol. I just ph'd all the water I have available because my ph pen was going bad on me before I came up the mountain and wanted to see how accurate it is. I figured I wouldnt need it but brought it just in case. My water came off of a water truck and into some 2500 gallon water tanks. I pump the water thru a tall ball water filter and into a tote. the ph coming out of my tote was at 9.0!...but then it slowly dropped down to 6.9 7.0. My well water was coming out at 6.7 and for some reason one of my water jugs with clean RO water was reading 6.6. so Im not sure how reliable my pen is right now lol and honestly im too far away to get a new one.

but with that being said, if my pen is accurate and the ph from my tote is still 7.0, do you think i should drop it? like I said all my other plants are doing ok. I just found a few leaves with some damage but nothing like on my main plant with this issue. instincts are telling me yes but like I said I cant afford to waste water if the ph drops to something really low.

Bugeye said:

Did you put fertilizer spikes in your pots? I've seen some leaf burning from giving back to back deep soaks when spikes are in -easy to in hot conditions when you have to water more aggressively. Just a thought.

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no, no spikes.