Commercial Production of Tropical Mushrooms Grown Organically

Project Overview

Project Type: Research and Education
Funds awarded in 2001: $36,081.00
Projected End Date: 12/31/2004
Region: Western
State: Guam
Principal Investigator:
George Wall
CALS/AES, University of Guam

Annual Reports


  • Miscellaneous: mushrooms


  • Animal Production: manure management
  • Education and Training: on-farm/ranch research
  • Farm Business Management: new enterprise development
  • Production Systems: general crop production
  • Sustainable Communities: new business opportunities


    Three tropical mushroom species were studied to evaluate the possibility of commercial mushroom production on Guam. These were the straw mushroom (Volvariella volvacea), the tropical oyster mushroom (Pleurotus ostreatus sajor-caju), and the medicinal species Ganoderma lucidum, or ling shi. The most reliable species turned out to be the oyster mushroom, but it was also the most labor-intensive. The straw mushroom required less investment; the medicinal mushroom was found to be reliable, but it took the longest time of all 3 species tested (3 months) to harvest. Coffee grounds and newspaper were used as substrates.

    Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture or SARE.