They look dry like growgrannies crack.
Have you put liquid over the leaves, what's that they are in.
Couldn't really say for sure but.
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Please note, when you reply to anything on the questions part of Growdiaries website, no one will be notified of this.I won't come back, even if you use a "@" tag in my name. Best to reach out to anyone thats a half sensible grower not happy to risk your grow with a happy guess and a lot of bullshit in DM using your inbox, as I'm so up myself I'm going to tell you it can be found in the bottom right hand corner of the site. If you're still that stupid, It's the small paper airplane button, if you have the mind of a housebrick.,it will be highlighted green if you have new messages, please remember to breathe in and out and poop regular too***