Question
If you plant the pit of a nectarine, will it grow and produce fruit?

Answer
Hi Wendy,
Thanx for your question.  Most likely, the pit or seed of the nectarine will sprout and growing into a tree if planted correctly.  The seed needs a cold period to break dormancy and sprout.  It will take 5-7 years to produce fruit from seed.  If you will do a search on this site, you will see a number of my responses that give instructions for planting a nectarine or other fruit seed.  I hope this helps.
Tom