Help! Slow growth and curling cotyledons

[greenthumbomaha]

I have a different theory...

Those party cups are too large for small paper towel seedlings. Craig uses a six pack for dense planting. That cup doesn't have enough roots soaking up the water. Save those cups for transplanting from a six pack cell to final pot up of an individual plant and harden off outdoors.

Do tell what mix this is. I've seen that black sliver before, but there's quite a variety of other material in there.

- Lisa