Answer: Several things may be wrong. Root damage during transplanting, or over- or underwatering can result in these symptoms. Are you fertilizing? If so, you may be over doing it. Seedlings need no more than a half strength fertilizer at every other watering session. A stronger solution or more frequent feeding can result in burning. What environment are the seedlings in? Good air circulation is a must, but drafty areas can cause the tender leaves to burn. I wouldn't give up on these seedlings just yet - Ihave seen seedlings in much worse shape than you describe (in my own home) make a complete turn around, but you may want to plant some extras as a back up.
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