Sometimes coco can be funny if it isn’t prewashed even if it’s just ready out the bag.
I’m somewhat having problems with my seedlings too. They look okay, but not like their usual. Seem to be growing a little slow. Sadly, I realised my trusty ph meter was acting up yesterday and managed to purchase two “used like new” ones for like $10 each when they usually go for around 60$. So I’m hoping at least one of them is working okay. I’m kinda in doubt about my ph right now and it may be the issue with mine. I should have started them in solo cups like I usually do.
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Those are my girls at 6 days old. Purple nuggets still hasn’t got far with her second set of leaves. Hoping a new feed with a newer ph meter will help them out.
If I were you, I’d germinate into a solo cup mate and just feed from day one very light nutrients until run off when it gets light. I have best success raising seedlings that way