Did you try Wendy’s Portabella sandwich last fall? How about a slice of mushroom pizza? Any fungi on your salad recently?

If you answered ‘yes’ to any of these questions, and you live anywhere close to the East Coast, then chances are your mushrooms were grown at Phillips Mushroom Farms in Kennet Square, Pennsylvania. The vast, nondescript warehouse-style buildings of Phillips Organic Mushrooms produce shipments approaching 1 million pounds of mushrooms a week. Now that, ladies and gentlemen, is a big load of shiitakes!

I recently had a behind-the-scenes tour of this farm, seeing for myself how mega-scale organic mushrooms are grown. Join me as I walk down a path of manure and fungus, exploring the fascinating, funky world of mushrooms.

Your author, complete with hair and beard net. Mushrooms are susceptible to all sorts of competing fungi and viruses, so this free-range farmer had to wear a biosuit.


Fresh mushrooms being picked. These mushrooms double in size every 24 hours, making harvesting a daily, year-round chore.


A Portabella cap, with healthy pink gills (difficult to see in this light) that indicate freshness. Younger Portabellas are harvested alongside the slightly older fruits, and dubbed ‘Baby Bellas’. Wook at dose wittle mushrooms in the background… d’awwwww!


How do mushrooms grow? In nutrient-rich compost, mostly. The white strands are the mycelium, the living fungus. The mushroom itself is simply a ‘fruit’ of the mycelium that releases spores. The mycelium grows in a black compost of straw and horse manure.


A shitake mushroom, growing out of a homemade ‘log’. These logs, which resemble loaves of artisinal bread, are primarily made of red oak sawdust.


Row upon row, stack after stack, vast rooms containing thousands of shitake logs wait in the semi-darkness. Each log is hand placed and hand picked, and yields several pounds of mushrooms across the course of a few weeks.


Mushrooms love moisture, and here the ‘logs’ are stacked into crates, waiting to be dunked into large soaking pools.


Ferial Welsh, the Mushroom Lady. If you’ve shopped at Baltimore or Washington, D.C. farmers’ markets, you can’t help but have seen Ferial; she has been selling mushrooms for Phillips and Mother Earth Organics for over 15 years. Find her stand at Arlington Courthouse, Dupont Circle and Falls Church. Her smile says it all…she loves mushrooms!


Shitakes waiting to go on a refrigerated truck. Much like shell fish, mushrooms remain alive and breathing long after they are harvested. I was told that, in most cases, mushrooms remain alive until they are cooked.


Each type of mushroom grows in a different environment. Here, black plastic is stuffed with compost and shaped into vertical logs to allow yellow oyster mushrooms to flourish.


A glimpse inside the bag. Straw and cocoa shells (gleaned from Hershey’s Cocoa, just up the road in nearby Hershey Pa.) are inoculated with mushroom spores, providing the white mycelium with nutrients.


Grey oysters…


…and yellow oysters.


‘Oyster poles’, where the vertical logs are placed.


The Maitake. Each plastic-encased maitake log can only grow one or two mushrooms per cycle. Generations of trial and error have gone into getting these finicky mushrooms to perform with consistency.


Phillips provides over 200 different private labels, including to Whole Foods and Wegmans. If you’ve purchased mushrooms from any grocery store on the Eastern seaboard, they probably originated here.


This mushroom farm employs over 400 people, and supports another 50 through ancillary jobs such as compost production. Here, dozens of people pack and label mushrooms.


Of course, every production facility must have a conveyor belt! In this picture, freshly sliced mushrooms wend their way towards containers and shrink wrap.


Kennett Square, Pennsylvania is officially mushroom crazy. On Main Street, a fungus-themed gift store sits opposite a restaurant dubbed Portabella’s.


The Mushroom Lady’s display at farmers’ market. Ferial travels to Pennsylvania several times a week for fresh-picked mushrooms, ensuring that they are even fresher than the ones available at high-end supermarkets.


Ready to doff my beard-net! Hope you enjoyed the tour :^)

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