Some seeds just do better than others... take a look... all planted at the same time and some are big and some are tiny runts
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None were givin nutes and one just started crinkling up. On the other hand the first one is doing great. Just happens sometimes. they can't all be winners
but you are not supplying very much information at all to get much advice back. Like what soil you use if you gave them any nutes if you ph'ed the water.
If you just ask why one isn't growing no one is going to know if we have no information at all. Could be something you gave it, could be a bad seed, could be bad water, could be ANYTHING!
INFO INFO INFO. You can never supply too much info when you are asking for help but you can, not supply enough