Definitely don’t start watering til runoff with seedlings! Only begin this when roots are well established. After your roots start to reach about the cup, you can go all hydro wit it.
@Alta.Gama has some great examples of how roots should look in coco. For the plant to be that small, the roots look like grown ups
Do yourself a favor and hurry up and join this cup contest and follow along and get advice from some pros
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