Question
I live in Meadville pa. wanted to know if its to late to plant watermelon from seed.

Answer
Dear Debbie,
It takes about three months for a watermelon to mature from a seed.  From your zone indication, you might be able to make it.  If you planted the seeds right now, you may have a watermelon the first of October.  It's doable, unless there's an early frost.  
I wish you well.
Kind Regards,
KD Liz
www.thelandofgoshen.us