I suspect they have several requirements the NW can't provide.

According to eHow
"To facilitate pistachio nut production, the trees must be exposed to short, cold winter weather and hot, dry summer conditions, but must not be exposed to springtime frosts, as this will kill the tree's young blossoms. They require full sun and dry, sandy soil and have no tolerance for excessive moisture, failing to thrive in areas of high rainfall or extreme humidity. In the United States, pistachios are currently being successfully grown in the arid regions Arizona, New Mexico, West Texas and Southern California."

Read more: How to Grow Pistachios : eHow.com http://www.ehow.com/how_4969083_grow-pistachios.html#ixzz1VWJJxw61

...and you are apparently aware pistachios come in male and female genders; a couple of trees will produce one tree with nuts.

Thanks for the info. I guess I'll just keep on "Dreaming of Pistachios" or move to Arizona. :)And yes, I am aware of the whole male/female thing. Thanks again and God bless! :)

hey, if you have $50 to blow. buy 3 and you have a decent chance of some combination of M and F plants.

Here is a link that might be useful: give them a try

Thanks "eeldip"! I just might be able to make my pistachio dreams come true! I'll show these to my husband and see what he thinks. I know I won't get instant gratification, but it sure would be nice to have a small pistachio orchard that actually produces in a few years. Thanks so much. You've given me hope.