Heirloom Portabella Mushroom Growing Kit Contains: Inoculated mushroom compost, casing and instructions. All you add is Water. It is complete. Best Temperature for Growing: 63 - 68 degrees Fahrenheit plus or minus 5 degrees Mushroom Kit Dimensions: Length 12",Width 10",Height 8" Grows several crops of mushrooms over 2 1/2 months Grown indoors at room temperature, fun and exciting