Can this plant be saved?

[jack.green]

Hello,
I live in Costa Rica, and am working with the soil and nutrients that are locally available, but I think the soil is quite porous and does not retain much water, anything over 250 ml just drains out of the 3 gallon pot.
This is a closet grow, the lights are a 100w full spectrum and I keep 20 hours of light and 4 hours of darkness to this Afghan Kush Autoflower. Bought seeds from a Spanish website called Ganesh Grow, they were just under $3 per seed.
Humidity in my area ranges between 60%-90% and temperature between 22-30 Celsius.
The following picture is a 35 day old plant, but as you can see it’s stunted. The leaves are curling up in a peculiar way, does anyone know what does this mean?
Thanks!

 

[Creeperpark]

Hello,
I live in Costa Rica, and am working with the soil and nutrients that are locally available, but I think the soil is quite porous and does not retain much water, anything over 250 ml just drains out of the 3 gallon pot.
This is a closet grow, the lights are a 100w full spectrum and I keep 20 hours of light and 4 hours of darkness to this Afghan Kush Autoflower. Bought seeds from a Spanish website called Ganesh Grow, they were just under $3 per seed.
Humidity in my area ranges between 60%-90% and temperature between 22-30 Celsius.
The following picture is a 35 day old plant, but as you can see it’s stunted. The leaves are curling up in a peculiar way, does anyone know what does this mean?
Thanks!

Try putting a drain tray on the bottom to help soak up more water from the bottom. Use the same 250 ml water but put it in the drain tray to be soaked up from the bottom. Be careful not to over-water and cut the oxygen off from the roots.

 

[jack.green]

Try putting a drain tray on the bottom to help soak up more water from the bottom. Use the same 250 ml water but put it in the drain tray to be soaked up from the bottom. Be careful not to over-water and cut the oxygen off from the roots.

Thanks for replying. So you think underwatering is the issue here?

 

[Creeperpark]

Thanks for replying. So you think underwatering is the issue here?

Only if the substrate is too dry after watering. If the soil is too dry it may have too much drainage because the water drains out before the soil can absorb it. Only you can know if it's too wet or too dry.

 

[jack.green]

Only if the substrate is too dry after watering. If the soil is too dry it may have too much drainage because the water drains out before the soil can absorb it. Only you can know if it's too wet or too dry.

Thanks buddy, I’m going to try that today

 

[chronosync]

A thorough soaking of the soil will help eliminate any possible dry pockets in the medium that might not be catching the water and like creeper said, letting some feed run through. Give a good soak until runoff and then bottom feed. Once you know its fully drenched then you can resume your normal drybacks. You will also know the how heavy the containers feel at max saturation. I usually give water when they are half way to dry, based on how heavy they feel.

 

[TanzanianMagic]

Hello,
I live in Costa Rica, and am working with the soil and nutrients that are locally available, but I think the soil is quite porous and does not retain much water, anything over 250 ml just drains out of the 3 gallon pot.
This is a closet grow, the lights are a 100w full spectrum and I keep 20 hours of light and 4 hours of darkness to this Afghan Kush Autoflower.

Humidity in my area ranges between 60%-90% and temperature between 22-30 Celsius.
The following picture is a 35 day old plant, but as you can see it’s stunted. The leaves are curling up in a peculiar way, does anyone know what does this mean?
Thanks!

The plant is getting too much light.

16/8 is all you need for veg, and that's already a lot. It isn't getting enough nutrients and water compared to the light it is exposed to.

Also, you might want to give the plant a light feeding. 100 PPM or 1.0 EC max until flowering.

Other than that, the plant doesn't look like it's dying at all. Just overstressed.