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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. Remove block and tent from the box.  

  2. Reishi is a SLOW GROWING mushroom species.  It will form differently depending on the amount of air exchange available.

  3. FOR ANTLER-LIKE FORMATIONS: DO NOT OPEN OR CUT THE BAG.  It will grow just fine on its own. SKIP STEPS 4 -6.

  4. FOR CONK-LIKE GROWTH: Expose the bag to more air by cutting and removing the top half of the bag, about 1-inch above the block.  Handle lightly as to not disturb mycelium.

  5. Return the block to the box.  Place the box and Reishi spawn inside the humidity tent, using the clip to close the tent.  The tent prevents rapid drying that will stunt or completely prevent any mushroom growth.

  6. Mist the surface of the block and inside the humidity tent 2-3 times daily.  Avoid soaking the block itself or mushrooms to keep it from molding. Keep the tent closed after misting.

  7. Put the kit in a place where it will receive indirect light.  At least 12 hours of low light is needed for mushroom growth.  Temperature should be between 60-80 degrees F.


Reishi will take 6-8 weeks to develop mushrooms.  Maintaining consistant conditions of light, humidity, and temperature during growth is CRUCIAL.

A humidifier during dry seasons of the year is recommended. 

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