Graphic of states where Ostrom Mushrooms are sold - with outlines of Alaska, Hawaii, Washington and Oregon state maps

Ostrom Mushroom Farms is the largest producer of mushrooms in Washington State and a proud USA company. Our mushrooms are shipped daily within Washington, Oregon, Alaska and Hawaii and further still through our exceptional foodservice and retail partners.

As we move into the future, we are poised to expand and broaden the reach of our magnificent mushrooms and continue to serve for another 90 years and beyond!

From our farm to your table, fresh, healthy, delicious!