How To Use Progressive Web App aka PWA On 420 Magazine Forum
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It's normal for the cotyledons to curl downward, in my experience. You'll probably have to wait for the first true leaves to get bigger before you could discern any problems. It's good that you added perlite to the FFOF though, that should help with drainage. The only issue you MAY see is that some people report that it is too hot (too many nutrients) for seedlings, but that may not be an issue with the added perlite.