How to Grow Psilocybe Cubensis without Spores

People who want to grow magic mushrooms usually ask how to grow psilocybe cubensis without spores. There are two ways to grow P. cubensis: with spores using magic mushroom grow kits and by adding spores to a substrate or the PK Tek method.

Psilocybe cubensis is a kind of magic mushroom strain that contains active compounds psilocybin and psilocin. This may also be called golden tops, gold caps, shrooms or psychedelic mushrooms. It is also known for being one of the widely distributed magic mushroom strains and for being very easy to cultivate. 

Psilocybe cubensis are preferred by growers because of its impressive properties. If you are new to shrooms, it would be smart to grow P. cubensis before learning how to cultivate more complicated strains.

Cultivation of Psilocybe cubensis

Growers cultivating P. cubensis for personal consumption may use a very simple growing technique known as the cake or PK Tek methods. These strategies can produce a limited amount of shrooms at the quickest time. They may also prefer more complicated or advanced methods which are used by professional cultivators. These methods need time, money and skills but over time, the rewards are immeasurable. 

Growing P. cubensis using mushroom kits

Beginners should use a grow kit because it is easier to use than other methods. A grow kit comes with all you need to cultivate magic mushrooms. Instructions are provided on every grow kit package. Take note that instructions on one kit are not the same as others so take time to read this before you open the kit. 

With a mushroom grow kit, you don’t need to handle P. cubensis spores. The spores are already in the growth medium and all you need to do is to follow the instructions. Most grow kit advice to place the mushroom grow bag or kit in a dark, humid environment. It can take just a few days for your shrooms to sprout using this method. 

The problem with using grow kits is you might end up contaminating your shrooms. You must check your mushrooms for any signs of contamination like slimy growth. 

Growing P. cubensis using the PK Tek method 

The PK Tek method is one of the most popular ways to grow P. cubensis. With this technique, you can cultivate your supply indoors or outdoors. You can also use organic materials like fruits or bread, anything goes as long as your shrooms are happy.

Gather the following things 

  • Ten wide-mouth jars in half-pint sizes and lids
  • A measuring cup
  • Hammer and nail
  • Mixing bowl and spoon
  • Strainer
  • Heavy-duty tin foil
  • An instant pot or large cooking pot with lid
  • Micropore tape
  • Small towel
  • Clear plastic storage box at 50 to 100-liter capacity
  • Drill and bits
  • Mist-spray bottle 
  • Perlite

You will also need 

  • A syringe with spores around 10 to 12cc of the spores
  • Organic material like brown rice, brown rice flour, coffee grounds, etc.
  • Medium to fine vermiculite
  • Distilled water

Things to sanitize your growing area and equipment

  • 70% isopropyl alcohol
  • Lysol disinfectant spray
  • Propane torch
  • Latex gloves, face mask or lab coat/apron


  • Prepare the jars by wiping these with alcohol. Disinfect the hammer and nail and punch around four holes on each of the lids.
  • Prepare your substrate. Combine 2/3 cup of vermiculite and about ¼ cup of water in a mixing bowl. Clean and disinfect the strainer using alcohol. Use this sterile strainer to drain water from the substrate mixture. Add ¼ cup of brown rice flour for a half-pint jar. Add moist vermiculite to the mixing bowl. 
  • Fill the jars to a half-inch from the rim of the mixture. Do not pack this too tightly. Using alcohol, sterilize the top part of the jar. Add a layer of vermiculite on the top. 
  • Screw the lids and cover the jars in foil. Secure the foil edges to avoid condensation.
  • Place a towel in the pot and place the jars on top. This prevents splashing of water which can get inside the jar. Now add water up to half the jar and slowly bring this to a boil. 

Cover this with a tight lid and steam for around 75 minutes. After steaming, let the jars cool down before starting the inoculation. 


  • Sterilize the table where you will conduct the inoculation. Wear gloves, mask and a gown.
  • Sanitize the end of the syringe with alcohol. Use a lighter or propane torch to light up the end of the needle until this is red hot. Let the end cool and wipe this again with alcohol.
  • Shake the syringe to make sure that the spores are evenly distributed. Insert the syringe as far as it can go through the holes on the lid of the can. Inject around ¼ cc of spore solution in every jar. Wipe the tip with alcohol every time you begin inoculating a jar. 
  • Cover the holes with micropore tape and set the jars aside. In 7 to 14 days your mycelium will be ready to use. 
  • Prepare the grow box by drilling holes for air and by adding perlite at the bottom. This should be at least 4 to 5 inches deep.
  • Now, open the jars and remove the white cakes. Make sure to place this on a disinfected surface. Rinse the cakes with water and place these in a plastic container with water. Place these with water and submerge in water. This will rehydrate the cakes after 24 hours.
  • When the cakes have rehydrated, roll these in vermiculite. Place the cakes on tin foil and place on a growing box with perlite. The cakes should be evenly spaced. 
  • Spray this with water and fan the lid. Cover the box. Spray this with water four times a day to keep the box humid. Fan the cover six times a day to improve airflow. 

After a few days, your shrooms will be ready for harvest. Follow these instructions carefully and you’ll get enough Psiocybe cubensis to last for a long time.

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