what do you think is the problem with my seedling

I have a dinafem white widow thats just started braking the soil (also taking a while to do) and a buddha purple kush auto thats actually sprouted and has been about just under a week. For some reason though the cotyledons are turning yellow but the proper leaves are still staying green and the leaves are curling down? I know the cotyledons die off anyway but i didnt realise they could this early? Im not giving any nutes obviously. I dont overwater, i only water when i place my little finger about 2 - 3 inches and the coco is bone dry. My water has a ph of 6.6 as well so i dont think it is that however my humidity is 30 percent in my tent when the light is on and temps range from 25 to 30.c so do you reckon its the temps? Would putting these seedlings under a see through plastic cup to act as a humidity dome help them to get going? And would foliar feeding help as well? (When the lights are off obv) Also the purple kush auto has a lot of purple on it such as purple stem and purple under the leaves is this normal for this strain or any purple strains?

For coco you want a pH to remain between 5.5 and 6.2 ( I've heard people say 5.5 - 5.8 for veg and 6.0 - 6.2 for flowering ). Do your best to keep the temperature between 22 and 29 degrees. The most cost effective way I've found to knock the temperature down a few degrees is to point a fan directly at your light.

Hopefully this helps!

I would keep the soil moist not real wet your temperature is fine for a seedlings. Coco has no nutes in it like soil.. Is the temperature in you room that or just under the light??? Try to lower it now to between 20-25c so your veg will grow better they like cooler temperatures so do flowering plants.. plus it keeps mold fungus down

You should be feeding nutes straight from the word go with coco.

Check out my signature link thread for some help on how to use coco. Along with EC testing to keep things happy.

PH 5.8 is where you want to set your feeds pH.

Your plants are beginning to get hungry.

Coco does have a small amount of nutrients to help start seedlings but not enough to sustain growth.


What nutes are you planning to use?

Are you going to be measuring nutrient strength? Eg EC ppm or TDS?


J

jondamon said:

You should be feeding nutes straight from the word go with coco.

Check out my signature link thread for some help on how to use coco. Along with EC testing to keep things happy.

PH 5.8 is where you want to set your feeds pH.

Your plants are beginning to get hungry.

Coco does have a small amount of nutrients to help start seedlings but not enough to sustain growth.


What nutes are you planning to use?

Are you going to be measuring nutrient strength? Eg EC ppm or TDS?


J

Click to expand...

I've been reading conflicting information when it comes to nutes for Coco. Some people have said to start feeding after the seed breaks its shell, others have said don't start feeding until the 3-4 week mark. Could you clear this up for me?

Thanks.