Leaf Edges turned upwards, heat stress indicated but temps are good.

[grey1223]

Maybe I missed it yesterday but I believe anything under 6.5 with your meduim is going to cause lockout problems. Especially of P, Ca, & Mg. Keep a close eye on your runoff as your medium will force it down after awhile.

[GaGrown]

I'll have to disagree again. My RH was and remains approx ~ 40%. give or take 1-2%.

Even after flushing them my RH did not rise that much.

Not to mention I had multiple symptoms. Leaf edges curling up, random spotting, eagle claw leaves, leaves dying.

I'm just confused as to how you can stand by saying it was a humidity issue when humidity was always within an acceptable range and then when I flushed it you still insist it was a humidity issue.

My soil run off was far below that of what these plants need in order to uptake nutrients in soil.

Even if I had solely just added moisture to the room via a humidifier it would not have resolved my problem.

Potassium is best absorbed in soil from ph 6.3-6.8. My ph was about 5.6-5.2.

In order for the stomata to open potassium is needed. K ions make their way into the guard cells adding rigidity opening the stomata.

Transpiration is also achieved through the stomata.

If the stomata are not opening, or not opening enough due to lack of potassium uptake because of a ph problem then the leaves will not be able to properly release moisture in the air; thus leaving the plant with poor means of cooling itself naturally. The result? Leaf edges curling upwards looking like heat stress when it's really a PH issue.

Imagine if all your pores closed completely on your body. Imagine your nose plugged, mouth sown shut and your erm.. butt corked up as well. Then go stand in a very bright concentrated light where the temperature is about 85-90 degrees. Now throw a box fan in front of you. That box fan would do you no good since your body would not be able to physically release heat from within.

The other symptoms I saw were also due to ph issues. As I saw multiple nutrient deficiency symptoms. Most nutrients are best absorbed in soil at a range of 6.3-6.8 as shown here in this chart

Had I not had multiple issues happening at the same time I may agree with you, but I'll have to say here that I do not agree with you.

You replied to this post 16 days after I had done a flush. RH wouldn't stay up for over 2 weeks based off 1 flush.

I don't mean to be rude and I am not trying to pick a fight but if you're going to stand by that then I'm going to have to ask you to back your reasoning with something more than reitterating something said by Stinky.

I'm sorry for seeming brash and I'm sure you have loads more expierence than I do but I went through alot of trouble to understand why my plants were having problems and how everything was linked together. If there is an alternative possibility that can be explained from a micro level to the symptom then I'd like to hear it. Otherwise I've already shown that this was not a simple RH issue.

Just so everyone knows I'm not on the attack. I just want to know as much as possible in as much detail as possible. I'm actually quite friendly and I mean no hostility toward GaGrown by this post.

Time for some medicine :jointsmile:

I'm glad you got things in order!You've done more than one flush,then? I thought you flushed today.Had you done it today then I would have been right. I still think all 3 of us are right ... I don't take any constructive critisism,in a bad way! No hostility taken! We are here to help one another! It's all good,Dawg! I can show you pics of humidity and heat issues. My pics!

[daihashi]

I'm glad you got things in order!You've done more than one flush,then? I thought you flushed today.Had you done it today then I would have been right. I still think all 3 of us are right ... I don't take any constructive critisism,in a bad way! No hostility taken! We are here to help one another! It's all good,Dawg! I can show you pics of humidity and heat issues. My pics!

cool cool. I was so worried of coming off the wrong way. I flushed 2 of them last saturday. This is when I water all the plants though. I think you had to of actually seen the plants to understand that even though it clearly looks like heat stress that it wasn't.

I've had heat issues before so I'm familiar with how it progresses but this time I had to many other things occuring at the same time; I didn't feel it was coincidence.

Either way the problem is resolved and everything is in check for now. :thumbsup:

[stinkyattic]

You guys are pretty much ALL right.
Heat stress actually exacerbates the symptoms of other problems. That scarring on the affected leaves would not have been so pronounced had the temps been a bit lower, but you still would have had that overfert issue.
Chemical reactions, including the undesirable ones that happen when your plant is overfed, occur faster at higher temps and any problems you have will appear even worse, just the way that LOW temps and wet soil make pH problems affect the plant more than they would have in fluffier, warmer medium.