Activation Steps

Remove the clip, spawn the substrate, use the box as a hanger and more!

4 day timelapse

This is what you should experience

Mushrooms # 1

Grow mushrooms from your used MyCO2 Bloom

Harvest Mushrooms

If you poked a hole, just twist the mushrooms as you pull. If you made slits, carefully cut the mushrooms free with a knife.

Mushrooms # 2

Don’t let them dry out, mist with a hand mister

Oyster Mushrooms

grown by a customer post CO2 generation

Oyster Mushrooms growing from used MyCO2 Bloom

Frequently Asked Questions

MyCO2 Bloom uses an aggressive species of Oyster Mushrooms that decomposes the substrate at a rapid rate which gives it a higher active carbon dioxide output. Bloom is intended for indoor gardens with bigger and/or flowering plants that require more Carbon Dioxide than clones, seedlings, and smaller plants.

MyCO2 Grow uses a slow growing strain of Reishi Mushrooms that works the same as bloom, just slower and drawn out over a long period of time. Since it takes longer to grow the active Carbon Dioxide output is notably less than MyCO2 BLOOM, however the product produces CO2 for a longer period of time.(up to 180 days)

MyCO2 Bloom and Grow are customer activated, giving the products a value protecting shelf life period as they await activation from an end user. Both Bloom and Grow have a 4 month shelf life. The shelf life period begins the date they are manufactured, indicated by the birth date, and should be on a store shelf within a week or two of the “SHIP TO STORE” date. We strongly advise our customers to activate the product the day they purchase it. To make sure you’re getting a MyCO2 that is within its shelf life use your smartphone to scan the QR CODE on the box to see the history, batch number, and best if used by information.
Simply remove the black that separates the live spawning culture at the top from the sterile substrate below, move the spawning culture to the substrate and gently massage it into the substrate. Within the next 7 days the culture should recover and begin growing into the substrate, indicated by white root like growth called Mycelium emanating outward from the spawn particles. Once you see this the active CO2 generation has begun. Put the bag back into the box and use the box to hang in your indoor garden. Alternatively if you are not using it for indoor gardening, place it in a room between 65 and 85 F where you can easily visit it and check its growth and leave it there until the substrate becomes a solid block of white fungi.

The mushrooms you are referring to are Psilocybe Mushrooms. No they do not, Bloom produces Oyster Mushrooms and Grow produces Reishi Mushrooms.

Our MyCO2 Secondary Decomposer Substrate will support the growth of Psilocybe Mushrooms, however growing and possessing Psilocybe Mushrooms is illegal and we do not condone the use of our products for such purposes.

Yes! and they are delicious! They can be used as a substitute in any recipe that calls for mushrooms and also have specific recipes that call for Oyster Mushrooms because the recipes support their flavor and texture.

Click here for Recipes at

Not only are they edible and delicious, Oyster Mushrooms are also medicinal!!

The Oyster Mushroom has statins and lovastatins that help in lowering cholesterol in the body. Cholesterol as a word was formed from the Greek language. Chole means bile; stereosmeans solid; and ol is a suffix derived from the word alcohol.

The body has 2 types of cholesterol – the good and the bad. The good cholesterol is the high density lipoprotein, HDL, while the bad cholesterol is the low density lipoprotein, LDL. It is possible to know the level of each through a blood test. LDL is deemed bad because as it moves along with the blood, it leaves deposits on the walls of blood vessels. Gradually it forms a kind of plaque that narrows down the blood vessels. This condition is called atherosclerosis. Should there be a blood clot within the narrowed vessels then the person is likely to suffer a heart attack or even a stroke.

HDL, on the contrary is thought to clear some of the LDL ferrying it to liver for disposal. The Oyster Mushroom has lovastatin, a cholesterol lowering agent. It is in the category of drugs called statins. Lovastatins were identified in the 1970s. In 1982, tests on high risk patients proved successful and in 1987 the US FDA approved it.

Medics, and particularly the American Heart Association recommend that people should have a cholesterol check. The association says it is important that every person over 20 years of age has a Lipid Profile. This is a simple blood test to establish the level of bad cholesterol in the blood. A person going for the cholesterol check needs to fast for a period of between 9-12 hours to ensure that the fat picked up is really the one established in the blood.

The Oyster Mushroom also has some bacteria fighting substances. In 1950, pleuromutillin, an antibiotic developed from the mushroom, was found to kill various bacteria including the bacterium salmonella. Pseudomonas is another bacterium that pleuromutillin was able to wipe out. A more recent research, (Stamets, 2005) found that Pleurotus ostreatus, which are extracts from the Oyster Mushroom, are able to weaken the bacteria Staphylococcus aureus and Escherichia coli. From a concentration of 100 000 000 per millilitre, the bacterial concentration dropped to a mere 1 000 per millilitre within a span of 24-72 hours.

The Oyster Mushroom has the scent of anise because it has benzaldehyde. Benzaldehyde is an organic compound which is widely sought for industrial use. Martres, a Frenchman and pharmacist, was the first to extract this compound from a natural plant. He did that in 1803. Thereafter, in 1832, two German chemists, Friedrich Wohler and Justus von Liebig, synthesized it. Because of its nice scent, pharmaceuticals use it a lot.

The uses of the Oyster Mushroom are evidently varied, ranging from the kitchen and the farm, to pharmacies and industries where its potential is yet to be exploited

Reishi Mushrooms have no culinary value whatsoever. However Red Reishi (Ganoderma lucidum), commonly known as Ling Zhi in Chinese and Reishi in Japanese, is a herbal mushroom that has been used traditionally for centuries as they are known to have miraculous health benefits.So what’s so good about red reishi?

  • It is non-toxic and can be taken daily without producing any side effects.
  • When it is taken regularly, it can restore the body to its natural state, enabling all organs to function normally.
  • Immune modulator – regulates and fine tunes the immune system.

Red Reishi is primarily composed of complex carbohydrates called water-soluble polysaccharides, triterpeniods, proteins and amino acids. Researchers have identified that water-soluble polysaccharides are the most active element found in Red Reishi that have anti-tumour, immune modulating and blood pressure lowering effects.

Another major active ingredient found in Red Reishi are triterpenes, called ganoderic acids. Preliminary studies indicated that ganoderic acids help alleviate common allergies by inhibiting histamine release, improve oxygen utilization and improve liver functions. Triterpenes are bitter in taste and the level of the triterpene content contained in a product can be determined by the bitterness.Red Reishi enhance our body’s immune system. Regular consumption of red Reishi can enhance our body’s immune system and improve blood circulation, thus improving better health conditions. Generally, Reishi is recommended as an adaptogen, immune modulator, and a general tonic. Red Reishi is also used to help treat anxiety, high blood pressure, hepatitis, bronchitis, insomnia, and asthma. A full list of reported benefits can be found here.

Once the brown substrate has turned into a semi solid block of whitish fungi it is ready to grow mushrooms. Take a pair of scissors and make a 1″x1″ X cut in around the center of the wider side of the block. Push all the excess air out of the bag, wrapping the extra loose bag to the side opposite of your X and secure it there with some tape. You should now have a whitish block of fungi with the bag made into a plastic skin, the only opening being the X cut you made. Now place the block back into the box after removing the trap door completely by ripping along the perforations, with the X visible through the trap door opening.  Place the entire thing in your kitchen or in an area you visit multiple times daily, with a hand mister filled with water beside it. Everytime you pass by check it, and if moisture is not visible on the surface of the bag and the trap door area, mist it good. Essentially keep it moist as baby mushrooms called Primordia begin to erupt through the X you cut.  Usually within 4 to 6 days the babies will turn into a fully grown bouquet of mushrooms like the ones printed on the box. Taper off your misting once they look like the ones on the box for a good 12 hours prior to harvesting. Harvest your mushrooms by twisting and pulling them off the block, grabbing the collection of stems at the base as you twist and pull. Alternatively you can slide a knife behind the caps and cut the mushrooms from the block. Remove all growth from the block and make it look as close as possible to the way it did prior to mushrooms growing through the X. Give it a week of rest, then perform the same misting procedures as before for secondary and third and fourth fruitings.






Use a rope ratchet, hook, bungee cord, or whatever you can make work for you to hang the box above your hoods. DO NOT REST THE BOX ON THE HOODS!! The heat will kill the fungi.

After activation, slide the bag into the box with the filter patch facing the boxes opening. Grab the loose section of the bag through the trapdoor and pull it through as you slide the bag into the box. close the trap door, lift the box by the handles and close the handles as shown in the video.





No, just leave it alone.

The filter patch covers a large hole in the bag. It prevents spores, dust, and other contaminants from entering the sterile environment within the bag, while allowing the CO2 generated to exit. Poking holes will not increase CO2 production, will void our warranty, and will likely lead to the introduction of contamination.

Just activate the product by removing the clip and mix the two parts together. Next, place it back within the box and set it in a place you visit often so you can check its growth once a week. Once the loose brown medium turns into a semi solid block of white fungi follow the instructions and videos here to grow the mushrooms.

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