Please help! Brown spots and dry dying leaves

Majorduke

Majorduke

Active Member
This girl is in her third week from seed. I am doing a deep water culture with cyco nutrients. It is a jock horror autoflower running on 24 hour photo. With 300 watt LED. Room temperature 77 degrees humidity 25% water temperature 70 degrees pH 5.5 ppm 300. This is the third set of leaves that have developed these around spotty patches and then the leaves dry and seem to die. My original nutrient solution was too hot over 500 so I flushed it and completely readjusted my nutrient solution down to 300 ppm. This was 3 days ago and haven't really seen any significant changes so far. Here are some pics any information would greatly be appreciated. Here are some pics so maybe somebody can help me identify what's going on here thank you14535634626171997368945.jpg 1453563518843-1357957027.jpg 1453563538732-139000946.jpg 14535634626171997368945.jpg 1453563518843-1357957027.jpg 1453563538732-139000946.jpg
 
Crab Pot

Crab Pot

Well-Known Member
It would help a lot if you would post pics with the LED's turned off but, it looks like you have pest damage. Have you noticed any pests? Can you post another pic of the under side of the leafs?
 
Igotthe6

Igotthe6

Well-Known Member
Get yourself a spray bottle use 1 teaspoon a gal Epsom salts to foliar feed. It looks like a mg def.What are you using for water/nutes.
 
Crab Pot

Crab Pot

Well-Known Member
News pics are a big help. I agree with Igotthe regarding the mag def. and they do look burned. Have you been using cal/mag?
 
Majorduke

Majorduke

Active Member
makka said:
whats your ec ? i suspect burn here
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It's right at 300 ppm now. At first I mixed it to the manufacturer's recommendations but was way too hot and I have since flushed it and reworked my bites to 300 ppm. Burn is what I suspected too that's why I flushed it a couple days ago. Maybe I should just give it a couple more days and see if it gets better after the flush
 
Igotthe6

Igotthe6

Well-Known Member
Your problem is pretty basic. It is def in mag,probably Ca. too. When using distilled or r/o water a calcium and magnesium supplement is a must with most nutes.
 
makka

makka

Well-Known Member
Majorduke said:
It's right at 300 ppm now. At first I mixed it to the manufacturer's recommendations but was way too hot and I have since flushed it and reworked my bites to 300 ppm. Burn is what I suspected too that's why I flushed it a couple days ago. Maybe I should just give it a couple more days and see if it gets better after the flush
Click to expand...
yeah u got it man its just burnt and the damage leafs wont recover just keep an eye on ppm untill new growth looks nice it already looks like its recovering to me on the new growth
 
Majorduke

Majorduke

Active Member
Man if that's it sounds like a pretty easy solution to this problem. I can get some calcium and magnesium at the hydro store, my only question is how to know how much to add to my solution to make it right
 
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