Need help identifying leaf problem

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Bigbrother420

Member
These girls are 18 days old from germination I fed them flora Nova grow about a week ago in demineralised water pH is always at 6 and the first leaves tips started turning white so I flushed them, iv just started feeding them last night with fora Nova grow and root excelurator, just asking you guys opinion on what you think it is, if it was really nut burn.

They are growing in 2/3 coco and 1/3 perlite mix, the strain is humboldts blue dream, they are under a 600 watt HPS bulb in a cool tube and the temp never goes over 78 I have an air con in the room
 

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Hessam

Hessam

Well-Known Member
Bigbrother420 said:
These girls are 18 days old from germination I fed them flora Nova grow about a week ago in demineralised water pH is always at 6 and the first leaves tips started turning white so I flushed them, iv just started feeding them last night with fora Nova grow and root excelurator, just asking you guys opinion on what you think it is, if it was really nut burn.
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Ok mate. How often and how much do you water/feed your plants? How much humidity do you have in your grow room? And how far is your light away from tops of your plants?

Since you're growing in coco, 5.8~5.9 is a more optimal range for pH.
 
thumper60

thumper60

Well-Known Member
looks like mag maybe a little nute burn maybe don't let that coco dry to much it will burn like that'
 
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Bigbrother420

Member
I was alternating feeding and watering every 2 days the humidity sits around 50% and the light is about 2 feet maybe a bit more but it's in a Cooltube, I'll upload another photo in better light. Iv transplanted them since then into 18 gallon pots and before That I had flushed them as well
 

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Hessam

Hessam

Well-Known Member
Bigbrother420 said:
I was alternating feeding and watering every 2 days the humidity sits around 50% and the light is about 2 feet maybe a bit more but it's in a Cooltube, I'll upload another photo in better light. Iv transplanted them since then into 18 gallon pots and before That I had flushed them as well
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18 gallon?! Is that correct?! :shock:

Your plants are overwatered and nute burned. You should stop feeding/watering for now. If you have flushed them already, wait until the top 0.5" of your medium feels dry to the touch, then adjust your water pH to 5.8 and water slowly to get 15% run-off. After that, you can start feeding again @ 1/5 strength.
 
Alienwidow

Alienwidow

Well-Known Member
Hessam said:
18 gallon?! Is that correct?! :shock:

Your plants are overwatered and nute burned. You should stop feeding/watering for now. If you have flushed them already, wait until the top 0.5" of your medium feels dry to the touch, then adjust your water pH to 5.8 and water slowly to get 15% run-off. After that, you can start feeding again @ 1/5 strength.
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If he is in 18 gallon pots and he waters to 15% runoff with a plant that small he will drown them. They wont dry out for...well forever. Probably 15 days.

To the op, if you are in those huge pots just feed/water like a cup or less a day. Till they get bigger and then feed more, you want to be feeding/watering once a day or two. Your either light bleaching them, starving them, or youv e burned them. Whatever it is i cant tell but you need a ppm meter and a ton of reading on how to feed and manage coco still.
 
Hessam

Hessam

Well-Known Member
Alienwidow said:
If he is in 18 gallon pots and he waters to 15% runoff with a plant that small he will drown them. They wont dry out for...well forever. Probably 15 days.
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I think he wrote that part wrong. That's why I asked him to make sure that he hadn't done that.
 
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Bigbrother420

Member
I transplanted them after the problems and haven't given them nutes since then just superthrive, calmag and root excelurator. I haven't watered them since the day I transplanted
 
Hessam

Hessam

Well-Known Member
Bigbrother420 said:
Shit my bad I'm in Australia I got mixed up 18 litre pot
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That's approx. 5 gallon which is too big for your already overwatered and nute burned seedling. Only way for your plants to survive in that container is that you don't saturate the whole pot. Just water in a small circle around the stem to make sure that the root zone is getting enough water/nutrients, but other parts of your medium stay dry. If you saturate the whole container, your plants will suffer from oxygen deprivation BIG TIME!
 
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