Discoloration on underside of seedling leaf

Hey all. This seedling was popped in a Jiffy pellet, and moved to cup with coco/perlite on 7/27. Today I noticed this dark purple discoloration on the underside of the leaves. The tops of the leaves look normal. Any ideas whats causing this?

Bump, worried about my babies

Could be any number of things, genetics, soil composition, etc..

It otherwise looks OK, so I wouldn't worry too much unless it actually becomes a problem.

Good Luck!

Nothing to be alarmed about. And you will need to be feeding lightly in coco pretty much from the start.

GreenGuy_1995 said:

Could be any number of things, genetics, soil composition, etc..

It otherwise looks OK, so I wouldn't worry too much unless it actually becomes a problem.

Good Luck!

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That's what I was hoping to hear, from what I've read they're too young to be deficient in anything and it's probably genetics. Thank you!

cowboylogic said:

Nothing to be alarmed about. And you will need to be feeding lightly in coco pretty much from the start.

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Awesome thank you. Currently feeding around 400 uS, runoff is around 400-500 so keeping it pretty light