I wanted to grow peanuts this year, and I've bought seeds, but someone just told me that they don't grow here. If that is true, then I won't plant them, as I have limited space. Can I grow them?
According to this web site, peanuts can be grown in "Zone 5 or higher":
It looks like most of Pennsylvania is in Zones 5b, 6a, and 6b (see map here) so chances are peanuts should grow where you live, although due to the shorter growing season in the northern states, you may do well to start your peanuts indoors early (probably too late for that this year).