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Reishi Mushroom Grow Block Kit Instructions

Reishi Mushroom Grow Block Kit

(Mushroom Bonsai)


reishi-block-07-l.jpgCongratulations, you are now the owner of a reishi mushroom grow block. The “block” is composed mainly of hardwood sawdust and wood chips bound together with mushroom tissue or “mycelium” contained in a plastic bag. Mycelium is the white fluffy material covering the outside of the block. Your block may already have begun fruiting, and this will be evidenced by the presence of small hard red or white mushroom antlers forming on the surface of the block. This is normal! If you wish to delay the fruiting for a few days, place the block in the refrigerator without opening the bag.


  1. The reishi mushroom may be grown completely inside the bag, without every opening it! Mushrooms grown in this manner will have an “antler-like” appearance, due to the high concentration of CO2 and lack of fresh air exchange. Fruits well at room temperature.

  2. The reishi mushroom will also produce a “conk-like” growth. To do this, it will need fresh air. Expose the block to fresh air by completely removing the top portion of the plastic bag (cut away everything above the mushroom block). Loosely drape the supplied humidity tent over the block. The tent is long and you may need to roll up the open end to shorten it. You can safely support the humidity tent with skewers, chopsticks or even wooden pencils poked into the block.

  3. Set your block on an uplifted platform such as an upside down pie pan on a dinner plate. This will allow any excess moisture to drain off and collect in the plate, preventing damage to furniture.

  4. Locate a place where your block will receive light, but not direct sunlight. Mist the surface of the block and the inside of the humidity tent with water from a spray bottle as often as you think about it. Several times a day is not too much but at least twice a day is recommended.

  5. Reishi grows very slowly compared to more fleshy mushrooms. Mushroom production begins with the appearance of small white bumps. As the bumps grow and age they will change to a golden brown to reddish color. It will take many weeks for the reishi to mature, indicated by the appearance of a fine brown dusting of spores on and around the mushrooms. Harvested mushrooms should be dried and stored in a sealed container for later use in medicinal teas. The glossy dried antler-like reishi mushrooms are attractive and used to good effect in dried flower and seedpod arrangements. The reishi grow block usually only produces one crop of mushrooms. Additional mushrooms can sometimes be produced by burying the block outside under the shade of a bush.


Everything Mushrooms – 1004 Sevier Ave. - Knoxville TN, 37920 865.329.7566 - http://everythingmushrooms.com