Hot
New
In stock
Sold Out

Organic Blue Oyster Mushroom Grain Spawn

Hot
New
In stock
Sold Out

Organic Blue Oyster Mushroom Grain Spawn

93 Reviews
$30.00

Hurry up! Sales Ends In

* * 20% off Container Bucket Spawn * *
Use Code: GROWINBUCKETS

Skill level Beginner
Grow location Indoor & outdoor
Spawn shelf life 4 months (refrigerated)
Certifications USDA certified organic
Bag weight 6 lbs
Fruiting temps 55-75°F 

Our USDA-certified organic blue oyster (Pleurotus ostreatus) grain spawn features a strain that is a fast substrate colonizer. It produces mushrooms with a strong bluish-gray hue, rich umami flavor, and soft meaty texture.

Blue oysters are great for beginners, and as our most productive oyster strain, they are reliable indoor year-round producers. If kept in the right conditions, they will yield substantial first, second, and even third harvests (making them one of the best commercial varieties!)

Blue oyster grain spawn can be for indoor cultivation year round. When used for outdoor cultivation, blue oysters are generally cold tolerant and fruit prolifically in early spring or late fall. 

Recommended use:

  • Blue oyster grain spawn can be used for indoor production using sawdust or straw or outdoor garden beds using straw or wood chips. It is also ideal for growing in buckets.
  • Do not use grain spawn for log inoculation.
  • This is not a mushroom grow kit. Blue oyster grain spawn must be combined with a substrate in order to fruit. 

Upon receiving your spawn:

Remove it from the shipping box as soon as possible. Then, unfold the top of the bag, making room for air space. It's also important to check and confirm that the filter patch is not obstructed. This will help the organism breathe and continue to thrive!

Scroll down for specifications, growing, and storage guides.

Customer Reviews
5.0 Based on 94 Reviews
5 ★
98% 
92
4 ★
1% 
1
3 ★
0% 
0
2 ★
1% 
1
1 ★
0% 
0
Customer Photos
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
JK
03/03/2025
Jason K.
United States
I recommend this product

Great stuff

Stuff works great

03/06/2025

North Spore

Thanks for the great review, Jason! We really appreciate your support.

MK
01/21/2025
michael k.
United States

Always great spawn

Always happy with the blue oyster spawn it's ready when delivered.

North Spore Organic Blue Oyster Mushroom Grain Spawn Review
01/24/2025

North Spore

We so appreciate the great review, Michael! Thanks for sharing!

W
11/13/2024
Wayne
United States
I recommend this product

Awesome First Time Grow

I enjoyed this product. I was able to grow mushrooms out of a diy bucket setup for the first time. These mushrooms kickstarted my hobby and I have been kicking it into full gear learning more about mushroom cultivation and setting up different varieties to grow and share. Thank you for giving me a gateway into such an incredible hobby.

11/14/2024

North Spore

We're so happy you're enjoying the experience, Wayne! Please reach out if you ever need anything.

JS
11/08/2024
jill s.
United States
I recommend this product

first time

I am still growing my first batch of mushrooms. But the spore arrived in great shape, and it is growing quite well in my bucket. Looking forward to having my first harvest soon.

11/10/2024

North Spore

Fantastic, Jill! If you need help with anything, please reach out.

JF
10/27/2024
James F.
United States
I recommend this product

Awesome Spawn From North Spore

This is awesome spawn that is vibrant and fast colonizing in whatever medium I use, straw, sawdust doesn't matter.Thank you North Sproe not buying from anyone else.

10/29/2024

North Spore

Thank you so much for the awesome review, James!

We use cookies to ensure that we give you the best experience on our website.

Organic Blue Oyster Mushroom Grain Spawn

Organic Blue Oyster Mushroom Grain Spawn

$30.00
x