COCO COIR Day 6 of first grow. How are they looking?

[JayGee]

2x mephisto - chemdogging
1x dinafem - dinamex
1x mephisto cheese haze

3 gallon fabric pots.

Is it normal for them to be lighter green in the middle or could it mean too much water? Been giving em 250mls of fertigation each 67% of the recommended seedling stregth ( AN Sensi coco grow). I was going to increase to the recommended 1ml per litre today, but thought I'd run these pics past you folks for your input, since this is my first grow. Thanks!

[Canuck147]

Plants look fine - growing medium concerns me - perlite?

[JayGee]

Plants look fine - growing medium concerns me - perlite?

Im using Canna Coco.
This is what AN told me when I asked them about perlite:

"As far as perlite, usually you don’t need it. Over the years coco has had a rocky start in the north American market, because growers kept treating it like soil (watering every 2-3 days) which causes lockouts.

So Companies added perlite to make growers comfortable watering daily, even though growers in Europe had been doing it for years.

Coco on its own has a nice lignin structure and holds oxygen very well, there is no need for perlite in most cases."

I figured if anything it would require slightly less frequent fertigation (within reason).

[Gingerbeard]

I found this on another web site.

https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/seedlings-turning-yellow.htm

My GO Box instructions say to have established seedlings before adding nutes. If yours were in my tent, I wouldn't be fertilizing, yet.

[JayGee]

I found this on another web site.

https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/seedlings-turning-yellow.htm

My GO Box instructions say to have established seedlings before adding nutes. If yours were in my tent, I wouldn't be fertilizing, yet.

Coco doesn't have nutrients so you have to supply from the start?

[Gingerbeard]

Ah! Thanks for the info. Sounds like coco has more involvement than soil.