Ostrom Mushroom Farms is the largest producer of fresh mushrooms in Washington State and a proud USA company. Our mushrooms a ... re shipped daily within Washington, Oregon, Alaska and Hawaii and further still through our exceptional food service and retail partners. With our new state-of-the-art farm in Sunnyside, Washington, Ostrom renews its dedication to serving and meeting our customer’s desire for the freshest mushrooms. We are excited about growing our company to meet the ‘mushrooming’ demand! Like seafood, coffee, and apples, mushrooms are the perfect kitchen staple for a modern Pacific Northwest culinary lifestyle; delicious, nutritious, and sustainably-grown. read more