Holburne Mushroom Farm Holburne Mushroom Farm Search | Advanced Search | New Members | Coupons and Discounts | All Categories Shopping & Specialty Retail >> Specialty Shops Holburne Mushroom Farm 1337 Holborn RoadQueensville, ON L0G 1R0 (905) 478-4556 If your business isn't here, contact us today to get listed!