Mushroom Grow Kit Co.
Blue Oyster Mushroom Growing Kit - 5 LBS Spray and Grow
Blue Oyster Mushroom Growing Kit - 5 LBS Spray and Grow
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Easy beginner-friendly blue oyster mushroom kit. We made growing mushrooms at home easy. Just open the front of the box, cut an “X” into the mushroom kit, spray it with water 2-3 times a day, and watch them grow! Our blue oyster mushroom grow kits are meant to be used indoors, so anyone can grow mushrooms at home.
- No experience or special equipment needed
- 100% Guaranteed to Grow
- Ready to use upon arrival (all you need to do is add water)
- Chemical and pesticide free
- Grow up to 3 lbs of fresh mushrooms per kit
- Fun for the whole family
Details
Details
Simple steps to start growing
Our blue oyster mushroom growing kit makes it easy for anyone to cultivate mushrooms at home. Just open the front of the box, cut an “X” into the plastic bag, and spray with water 2-3 times daily. Within days, you'll begin to see your blue oyster mushrooms thrive right before your eyes.
Perfect for indoor gardening
Designed for indoor use, the blue oyster mushroom grow kit is ideal for those with or without gardening experience. No special tools or previous skills are needed, making it accessible for all ages. It's a wonderful activity for families who want to explore the joys of mushroom growing together.
Enjoy chemical-free mushrooms
Each blue oyster mushroom kit promises fresh results with zero chemicals or pesticides involved. You can expect up to 3 pounds of delicious mushrooms per kit. Enjoy this reliable, fun method to have farm-fresh produce on your tabletop with guaranteed growth success upon every purchase.
What's Included
What's Included
Each Blue Oyster Mushroom Kit Includes:
- 1 Spray and Grow Box
- 1 Free Spray Bottle
- 1 Ready-to-Use Blue Oyster Mushroom Grow Kit Mycelium Block
- Detailed Instructions
Optional: Plastic Humidity Tent
FREE SHIPPING on orders of $125+
FREE SHIPPING on orders of $125+
Free contiguous U.S. shipping (excludes Alaska and Hawaii)
Instructions
Instructions
How to use your blue oyster mushroom kit
- Open the front of your blue oyster mushroom grow kit. Remove the spray bottle. Then slice an 'X' into the plastic of the mushroom kit with a sharp knife.
- Fill the spray bottle included with water and spray your oyster mushroom kit where you sliced your 'X'. You should spray your mushroom kit at least twice a day (more if you live in a dry climate). If you can spray your blue oyster mushroom kit 4-5 times a day it will be much happier. You should give your kit 8 -12 sprays each time you mist it.
(If mushrooms start to grow but dry up and die, your growing conditions are too dry and you should make a humidity tent.) - Place your grow kit in a warm, humid part of your home and out of direct sunlight. It takes 3-7 days for 'pins' or 'baby mushrooms' to form.
- Harvest 4-7 days after pin formation.
Did you know blue oyster mushrooms can double in size every 24 hours once they start fruiting?
Do I Need a Humidity Tent?
Do I Need a Humidity Tent?
No...unless you want bigger, fresher mushrooms.
Our grow kits are made to be used without a humidity tent, but having 100% humidity creates a growing environment for mushrooms to flourish.
Our flexible humidity tents have ventilation holes for fresh air exchange (mushrooms breath oxygen just like we do) and are easy to store when not in use.
They also help protect and keep clean your grow kit, table top, kitchen counter, or shelf.
If you live in a dry climate, it's a good idea to cover your blue oyster mushroom growing kit with a humidity tent to help keep moisture levels higher.
You can always make your own out of a plastic bag or clear plastic bin.
How to Make a Humidity Tent:
- Take a trash bag or other large loose bag and cut plenty of ½ inch holes throughout it. THIS IS IMPORTANT: Mushrooms breathe in oxygen and exhale CO2 just like we do. They will suffocate and abort if there is not enough airflow.
- Gently place the bag over your blue oyster mushroom kit and mist the inside of the bag every day. When you start to see baby mushrooms form (pinning), you can remove the bag and keep misting the oyster mushroom grow kit.
Pro Tip: You can also use a clear plastic tote with holes cut in it instead of a plastic bag. This is a great option if you are going to be ordering recurring mushroom grow kits in the future.
Storage
Storage
We recommend using your blue oyster mushroom grow kit upon arrival for best results. If you're not ready to use your mushroom growing kit immediately, it can be stored in a cool dry place, out of direct sunlight, for up to 6 months. Keep in mind that mushroom mycelium is alive!
Blue Oyster mushroom grow kits can be refrigerated for up to 6 months (preferred storage method if possible).
Our Guarantee to You
Our Guarantee to You
We 100% guarantee your blue oyster mushroom kit will grow mushrooms or we send you a new mushroom kit for free (or refund your money if you really don't feel like trying again).
95% of the time if a customer can't get one of our oyster mushroom growing kits to produce mushrooms its due to low humidity in the growing environment.
We highly suggest you make a humidity tent (or buy one) to maximize the chance of producing a large flush of mushrooms to harvest.
New to growing mushrooms? Check out blue oyster mushroom questions we get asked often
Frequently Asked Questions
How long does it take to blue grow mushrooms?
Most blue oyster mushroom grow kits have the first harvest (or “flush” in mushroom terms) ready in 7 days of starting your oyster mushroom kit.
Did you know you can 3-4 flushes (harvests) of mushrooms per grow kit?
Each round of fresh oyster mushrooms is smaller than the previous but keep spraying your kits to get as much as you can out of them.
What is the best mushroom growing kit for beginners?
The best mushroom grow kits for beginners to start with are Spray and Grow tabletop kits. We recommend starting with blue oyster or lion's mane grow kits.
Blue oyster mushroom grow kits are aggressive growers and ready in 7-10 days.
Lion's mane mushroom grow kits will take a little longer but are very easy and low maintenance for first time growers.
What is the shelf life of a Spray and Grow kit? How long can I store it or wait before using?
We recommend using your blue oyster mushroom grow kit upon arrival or as soon as possible for best results. If you would like to wait, you can store your oyster mushroom kit for up to 6 months in the refrigerator or a dry, cool, dark space inside. Remember, your blue oyster mushroom kit is a living organism.
How frequently (and how much) do I need to water my mushroom kit?
You should spray your mushroom kit at least twice a day. If you can spray it four to five times a day, your grow kit will be much happier.
If your block appears dry, you should add more water. We recommend 8-10 sprays each time.
A humidity tent will help keep up the humidity level in between sprays and is helpful to us.
How many rounds (or flushes) of fresh mushrooms will my grow kit produce?
We 100% guarantee your 1st flush (harvest) of mushrooms.
Your grow kit can easily produce a 2nd and 3rd round of fresh mushrooms (even a 4th if you push it).
Just keep in mind that every new flush of mushrooms is subsequently smaller than the previous. Your first harvest should be 2 to 2.5 pounds of fresh mushrooms.
We recommend getting a new grow kit after your second harvest if you are trying to grow mushrooms as a consistent food source to cook with.
When done, crumble up your mycelium block and use it as garden soil or compost!
How does Mushroom Grow Kit Co. compare to North Spore, Back to the Roots, Petit Champi, and other mushroom grow kit brands?
Mushroom Grow Kit Co. is consistently the best value for your money when you look at quality, price per pound of fresh mushrooms grown, and reliability.
Our mushroom grow kits perform better than North Spore's for a few different reasons.
At Mushroom Grow Kit Co., we use first-generation grain spawn for all of our grow kits (which means it is stronger and younger). We also use organic master's mix for our substrate. Master's mix consistently grows the most mushrooms because of how nutrient-packed the organic hardwood oak and soy hulls are when combined with our grain spawn. This is why our grow kits actually work so well for home growers.
High-quality substrate and grain spawn makes high-quality mycelium, which in turn grows high-quality mushrooms.
We autoclave and fully sterilize every mycelium block so our mushroom grow kits come completely hydrated and healthy.
Other mushroom grow kit brands like North Spore and Back to the Roots use supplemented sawdust for their substrate. Using only sawdust cuts the yield in half compared to master's mix. It also tends to lead to drier, less hydrated blocks, especially if the blocks are steam pasteurized and not sterilized in a proper autoclave.
Our customer service team is made up of actual mushrooms farmers who grow mushrooms on the daily for a living. We are willing to go the extra mile with personalized grow tips to make sure your grow kit is a success.
For a more in-depth comparison check out: Top 5 At-Home Mushroom Growing Kits Reviewed: 2026
Is it safe to grow mushrooms in my house?
Yes. If you are worried about mushroom spores in your house don't be! Mushrooms should be harvested or picked before they spore. If you don't catch them in time, they produce a miniscule amount you can easily wipe up.
If you have mushrooms growing out of the walls of your house, you need to clean your house more often (respectfully😅).
A humidity tent also helps contain any unwanted spores.
Do I need special equipment to grow?
No, not at all. Our beginner-friendly mushroom grow kits come with a free spray bottle included and are made to be used upon arrival with no additional equipment needed.
Mushrooms are low maintenance. All they need is a few sprays of water 2-3 times a day and some love.
Can I grow mushrooms year-round indoors?
Yes! Our mushrooms grow kits are made to be used indoors. This stable environment allows you to grow them anytime, anywhere inside.
Does you home temperature fluctuate?
So does the temperature outside where mushrooms naturally grow.
Lion's mane and oyster mushrooms can tolerate a range of temperatures from 60-85 degrees.
What is the difference between a fruiting block and boxed mushroom grow kit?
A fruiting block is a mushroom grow kit that comes in bag, not a box. They also do not include a free spray bottle. Otherwise the fully colonized block of mycelium is the same heart and soul of our boxed grow kits.
This allows us to keep our prices low (without compromising on quality) and pass on the savings to you, our beloved customers.
Fruiting block grow kits are a better choice for those who want to grow mushrooms in a martha tent set up, grow tents, or anything with an automated humidifier running.
Our mushroom fruiting blocks are also perfect for your BoomRoom from North Spore if you have one.
Why Mushroom Grow Kit Co?
Our mushroom fruiting blocks yield up to 3 lbs of fresh mushrooms each block. Just cut, spray 2-3 times a day with water, and grow. Our fruiting block grow kits are fully colonized and ready to use upon arrival. They also come with quick instructions attached to the bag.
How do you know you can trust our mushroom grow kits?
Because we actually use these same mushroom fruiting blocks on our family farm in Phoenix, AZ to supply the local market with fresh mushrooms.
As always, our mushroom fruiting block grow kits are:
- Chemical and pesticide free
- Handmade and packaged with Love
- No experience or special equipment needed
- 100% Guaranteed to Grow
- Ready to use upon arrival, all you need to do is add water
- Fun for everyone!
Let customers speak for us
Andy is the GOAT when it comes to making mushroom grow blocks! Every single one he has sent has pumped out a beautiful flush of mushrooms. We have had so much fun turning mushroom laymen into converts using his excellent supply of blocks. Fun for kids and parents alike!
This was so easy!No extra equipment or a whole grow tent required. I was even able to get multiple harvest from the same block! My students and I grew multiple varieties from this company and from the staff to the students, we all truly enjoyed this kit!
I had a fantastic experience with the Lion's Mane fruiting box from Mushroom Grow Kit Company. It was super easy to get started, produced a bountiful harvest of beautiful mushrooms, and they tasted incredible in my dishes. Highly recommend for anyone wanting to grow their own!
Amazingly healthy and huge flush! Highly recommend~
I took a quick video of start to finish. Really easy oyster mushroom growing kit.
We got some big mushrooms off this blue oyster grow kit
Growing it in our guest bathroom. Nice lions mane mushroom kit.
I’m happy with the blue oyster mushroom kit and lions mane grow kit. Excited to grow the pink oyster mushroom kit when I am done with the blue one.
Bought this mushroom growing kit as a little science project with my kids. Watching the lion's mane mushrooms grow every day was pretty amazing.
The pink oysters were super fast to fruit. Lion’s mane is starting to take off. The blues just started pinning now that we finished the pink oysters. Pretty happy with everything. Would buy again
This is my second lion's mane mushroom grow kit from Mushroom Grow Kit Co. Both mushroom growing kits produced great harvests.
These indoor mushroom fruting blocks made it simple to grow your own mushrooms at home.
I bought this grow kit and one from North Spore at the same time to test them out. Been spraying both everyday for a week now and this one has grown but the one from North Spore seems dead and smells weird.
My apartment is tiny. I set up both grow kits and a humidity tent in my bathroom. The lion’s mane is really starting to pop out after a week of spraying. The oyster mushrooms had a huge first flush. Trying to get a second flush from them now.
The lion mane mushroom cultivation kit started fruiting really fast. Definitely a solid mushroom grow kit