P/K Deficiency?

[Kind Sir]

Hey there, I havnt had too many issues since I began growing luckily so I cant confirm whats going wrong. Ill explain my situation.

5gal smart pot - BuildaSoils Living Soil Modern Mix

4Ft 8bulb T5HO -Needs better ventilation, possible problem but havnt changed anything and got good results prior.

RH: 15-35% Low
Temp: 72-80F


It seemed to start the day after I foliar fed, right before lights out.(Should be opposite I understand)
-200x Aloe Powder, Coconut powder, Protekt.
I thought I put a low dose of the silica (protekt), but leaves dried up with different colors of green. It definitely didnt look like it was from the light reacting with the water droplets, looked like overfed.

Now, its mainly at the top where the problem is occuring. These pictures are from Sunday and it got a tad worse. Ill update in 5 hours after work.

 

[Kind Sir]

I dont use bottled nutrients (unless experimenting) and gave all my veg plants the same water, It sits out for 24hr.

Usually use plain water, I add coconut/aloe powder about once a week now. I used it too often at first.

The other plants are doing great, I foliar fed all the plants the same that day as well.

 

[Alienwidow]

whatever you did its not good. You shouldnt have such aggressive yellowing in veg. Probably burnt. Maybe the tea wasnt diluted enough?

 

[Kind Sir]

whatever you did its not good. You shouldnt have such aggressive yellowing in veg. Probably burnt. Maybe the tea wasnt diluted enough?

I didnt bubble anything, just powdered aloe/coconut sometimes. Is that what youre talking about?

What do you think I should do? Ill get an updated pic for you right when I get home.

Edit: Its just weird that no other plants are responding similarily at all. I was debating on a small "flush" just incase? Do you think its from the foliar feed? Its been like 12 days since tho, Im not sure what to think. Sorry Im so useless lol!

@greasemonkeymann @Grandpa GreenJeans @vostok

 

[Alienwidow]

I didnt bubble anything, just powdered aloe/coconut sometimes. Is that what youre talking about?

What do you think I should do? Ill get an updated pic for you right when I get home.

Ha! Dont ask me i dont foliar feed for this exact reason. I guess you have two opitons, try to wash it off, or let it work its way out..... But ya, i thought most foliar applications were done with diluted tea brew. If you brew it a few times youll be able to push it harder the more you play with it....find the plants "safe word", and push it to there. Ive never done it, im just passing along info i read.

 

[thegreensurfer]

Why the coconut powder as a foliar? Or even aloe for that matter. Plants don't need that much b vitamin.
I've used silica supplementation with great success using only soil applications. Potassium silicate dries up into a salt so maybe it drew excessive moisture from your leaves, and moisture stress can resemble K deficiency.

 

[Kind Sir]

Ive bee

Why the coconut powder as a foliar? Or even aloe for that matter. Plants don't need that much b vitamin.
I've used silica supplementation with great success using only soil applications. Potassium silicate dries up into a salt so maybe it drew excessive moisture from your leaves, and moisture stress can resemble K deficiency.

I read about alotnof 9organic people foliar especially aloe, but cocnut as well. Im going to use a test plant from now on.

My RH is very low as well, maby ill put my humidifier in there to raise it? Whats your opinion?

 

[thegreensurfer]

Ive bee

I read about alotnof 9organic people foliar especially aloe, but cocnut as well. Im going to use a test plant from now on.

My RH is very low as well, maby ill put my humidifier in there to raise it? Whats your opinion?

You mentioned you had poor ventilation, a humidifier in that environment might cause some trouble so if you can fix your ventilation I would say go for it. Moisture stress occurs when when the humidity is too low, the temperature is too high, or transpiration is too rapid... it resembles what you have. Residual salts on the leaf could also be to blame as salts absorb moisture, mimicking the stress....and maybe your low humidity evaporated the protekt liquid before the Si/P salts had a chance to penetrate the leaf.
It can also simply be that you're having a K deficiency, the pot looks small in relation to the plant but that can be an illusion.
I've had good results with potassium silicate in the feed water, I add it first before nutes then mix very well since it tends to bind with calcium if improperly mixed(looks like little white globs/flakes). It doubles as a ph up to counter the nutrients tendency to lower the ph.
Hope this helps.

 

[Kind Sir]

You mentioned you had poor ventilation, a humidifier in that environment might cause some trouble so if you can fix your ventilation I would say go for it. Moisture stress occurs when when the humidity is too low, the temperature is too high, or transpiration is too rapid... it resembles what you have. Residual salts on the leaf could also be to blame as salts absorb moisture, mimicking the stress....and maybe your low humidity evaporated the protekt liquid before the Si/P salts had a chance to penetrate the leaf.
It can also simply be that you're having a K deficiency, the pot looks small in relation to the plant but that can be an illusion.
I've had good results with potassium silicate in the feed water, I add it first before nutes then mix very well since it tends to bind with calcium if improperly mixed(looks like little white globs/flakes). It doubles as a ph up to counter the nutrients tendency to lower the ph.
Hope this helps.

I have a 4x4 tent in a room for flowering, its has no light leaks. I veg in the same room carefully, for now. My tent has a duct fan venting out the top into the room. Its cold out, so I just have a window cracked and a small "warm air intake" on the ceiling. I have a 6 in hurricane inline fan I was debating on cutting a hole in the wall and venting air out while drawing it in from the window. The pressure from the inline fan should have outside air coming in nice, you think?

Ive had 3 successful harvests since feb 1st last year, just now having any real issues. First thing ill do is put the humidifer in the room, atleast get it up to even 35%.

I misted pure water on the troubled plant to help wash off anything. Its in a 5gal smart pot, I just transplanted a month ago so thats not the issue, illusion ( ; .

I wanted to do a topdress incase its a deficiency, but not sure yet.

 

[thegreensurfer]

Yea if you can cut a hole and vent into the wall or ceiling, do it. You won't even need to draw air from outside, with that negative pressure in the room cool fresh air will just come in by itself. It will be possible to open/close the window to tweak your room temp. The humidifier will help raise temps too.