Burnt Leaves. Too much nute? Not enough?

freddie747

Active Member
This morning I did my usual testing pH and ppm measurements and adjusted pH down (as I have had to do since day 1). No biggie. Most days I seem to bring it down from 6.3 or 6.4 to 5.4 or 5.5. I am 3 weeks into flower and things were coming along and actually growing too tall (which you guys helped me fix). The 1st 2 weeks of flowering were pretty great to my eye with very few issues.

This morning I woke up and some of the leaves had bad burns. It is not from the light since they are middle/upper leaves - not tops (also no problems on lower leaves). The tops still look good with little buds starting to appear.

Each morning when I check the ppm, it is higher than the night before so based on my research here I believe that they are drinking more than eating. Last night the ppm was 561 and this morning it was 605 which is a little higher than usual, but only by a little. When I reduced the pH to 5.5, I also reduced the ppm to 455. After reading the thread similar to this issue, I thought I might be doing more harm since it might be a nute deficiency vs. too much.

I am using hydro with about 10 gallons of water and have 3 females left on 3rd week of flower. I really need a little out of this crop since I am totally out. I feel like I am in the home stretch and dont want to mess it up.

Am I doing the right thing? Does it look like too much nute?

Picture 1 is of the "whole room" and 2 and 3 show the issue. The 4th shows the healthy part of my smallest one.
 

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OK. I am a big time Newbie, and I really screwed up. I think I now know why this problem occurred. I thought my res water was getting a little to warm so I mixed some ice in some water to cool it down and did not let the ice fully melt. So, I am sure I have damaged some of the roots. One of the plants has no damage at all which makes sense since I am sure the ice couldnt get to it the root balls of the other two plants would block it from flowing there.

So, the plants are a bit worse today than yesterday, but there still seems to be growth and not huge damage.

I am hoping this problem will just go away with care. Is there something specific I can do to fix this or should I just do my normal maintenance and let it go away over time? I plan to replace the entire res on Monday so maybe that will help since I should be able to get rid of the dead/broken off root pieces at that time.
 
Now I am on day 3 of this issue and it is getting worse. Clearly I am not doing what it takes to fix this issue. The smallest plant is still OK, but the other 2 are in worse shape - more leaves have the problem - some curling up, some down, burnt tips. Some leaves have fine tips but the leaf center is all brown.

Please help. I really dont know what to do and I am afraid it will be too late soon.
 
I'm kinda new and into the 2nd week of flower and ppm is 1000 and I am going to increase it .... something to look into is are your plants getting enough food
 
Sorry I can't help.
My leaves look liek that sometimes too and they end up out growing it...
 
WOW i have the exact same problem...i posted and got hardly any response so if anyone has any ideas HELP US OUT!
 
I thought it might be Mag deficiency so I disolved and put in 2 tsp of EPSOM salt. I let that go until today.

I dont know if that helped. I attached pictures from this morning.

I also thought it might be root problem - as described in previous post - so I decided I better just change the res.

When I changed the res, there was lots of white fluffy root mas floating around in the old res. The bubblers were a little slimy, but did not have algae on them. The roots on the plants did not really look brown - they looked more white than brown, but maybe a purplish color that matches the res color.

Anyway, I cleaned everything out, changed the res and put everything back in.

I am curious if it is normal to have that kind of gunk in the res or if that is signs of a bigger issue. As you can see by the pics, the buds seem to be coming along nicely so maybe I have nothing to worry about. I did not take pictures of the old res since I did not really have the chance due to folks coming over ...
 

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That looks like it might be mg deficient because the veins are being spared and the leaf margins are turning upward. I am having the same problem with mine. You should try a foliar spray with epsom salts and also water them with epsom salts dissolved in the res. It could take up to 6 days to see results. I am on the 4th day of treating mine and they are starting to get better.
 
GrowFAQ my friend, that looks more like a Def than a burn to me. the general blueish color of the interior of the leaf and all. I read last week that epsom salt feeding won't result in visual improvement for a week. Patience young padawon. Also..... oh, also, some deficiencies will only improve the uneffected leaves/new growth but the old/effected leaves will remain fcuked up.
 
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