Kit contains an all-natural hardwood log injected with shiitake spawn and produce mushrooms every two months for years. Grow indoors with plants or outside in shade. To produce mushrooms, soak it in non-chlorinated ice water for 24 hours. Harvest in 6-10 days. Logs require regular soaking in nonchlorinated room-temperature water every two weeks. PLEASE NOTE: Logs are ALIVE and can't remain in the packaging without air and light for more than two weeks. Logs are living organisms and must be opened within 2 weeks of shipping. For Christmas delivery please write 12/20 in second address line.Thanks!