Burnt leaf edges at such early age?

Hi guys,

I have started seeing burnt leaf edges since about a day or so. It had not have this problem until now (This is week 2 since plantation of the germinated seeds), so I am not sure what this is about. The temp has kept near 75F and humidity has been normal. I have watered it every 4 days. The medium is 5050 coco/perlite. What problem could contribute to the yellowing of the new set of leaves?

Thanks in advance for your response...

with the coco-perlite dirt you'll need to add your own nutrients since neither of them have any. id hit it with a little molasses with salt. 1/4 teaspoon/quart for molasses and 1/4 teaspoon/quart of salt. coco/perlite is for advanced growers that dont want to have a fail/grow and knowing whats in the dirt for easier diagnosis.

Are you checking the PH?

Yeah, I am checking and controlling the pH. I read that I shouldn't give any nutrients for the first two weeks, and this is why I haven't given her any. I guess it's about time for nutrients! I have Humboldt's set. Should I simply follow the basic nutrient schedule? My plant is JD's Lowryder Auto.

Nutes are always a bit of a guessing game but rule of thumb is to start with 1/4 the suggested and go from there making sure it doesn't show any signs of deficiency.

poky32 said:

The temp has kept near 75C and humidity has been normal.

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That's a bit warm I would say, unless you are baking a cake.

AimAim said:

That's a bit warm I would say, unless you are baking a cake.

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thats what i was thinking....

How do you keep the temp down? My room seem to get a bit warm occasionally, and I keep the plant in a micro PC case.

Do you mean 75F?

Yeah 75F. Room can get to 80F to 85 depending on the weather.

Did you test your coco for ppm before use?
Coco is produced near the sea and absorbs a lot of salt,which will kill your seedlings if not rinsed out.
After losing a couple of seedlings coz of salt in new coco,i always test my coco for ppm before use.
If you have any of the coco left over from what you used,put a handfull in some water and let it sit
for about an hour.Then test it with your TDS meter(if you have one)deducting the original ppm of water.
I recently tested some that had 400ppm salt,before i rinsed it down to about 200ppm.
My water being 150ppm.
The coco i bought was advertised as washed.
GL.

hopesluck said:

with the coco-perlite dirt you'll need to add your own nutrients since neither of them have any. id hit it with a little molasses with salt. 1/4 teaspoon/quart for molasses and 1/4 teaspoon/quart of salt. coco/perlite is for advanced growers that dont want to have a fail/grow and knowing whats in the dirt for easier diagnosis.

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Idk about putting salt into that mixture pure molasses would be fine but salt will only hurt the plant .....ya I think it might just want a feeding go light like 1/8 recommended dosages

I would skip the salt for sure!!