(+€26,95)
Organic Blue Oyster Mushroom Grain Spawn
€26,95
USDA Certified Organic
Trusted by 350K+ Growers
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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 production using straw or wood chips.
- 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.
Specifications
- Weight: Approximately 6 lbs
- Hydration: Average of 47%
- Bags: Gusseted 2.2 mil polypropylene
- Filter: High efficiency .2 micron
- Inoculation Rates: 6 lb. bag of grain will inoculate between 120-165 lb. sterilized sawdust, and 100-130 lb. pasteurized straw
- Sterilization method: Commercial grade autoclave sterilized
Temp, Humidity & CO2 guide
| Temperature | 55-75°F | 13-24°C |
| Humidity (Phase 1: Primordia) | 95-100% |
| Humidity (Phase 2: Fruitbody) | 85-95% |
| CO2 Sensitivity (Phase 1: Primordia) | <1,000 ppm |
| CO2 Sensitivity (Phase 2: Fruitbody) | <1,000 ppm |
- Primordia - The earliest recognizable stage of fruitbody development. Also known as “baby mushrooms” or “mushroom pins.”
- Fruitbody - A fully grown mushroom, the reproductive structure of the organism in which the spores are produced.
- CO2 sensitivity - When CO2 levels are too high, yields will decrease, stems will become long and stringy, caps will be small, and/or growth will halt.
Indoor cultivation
Oyster mushroom grain spawn can be mixed into sterilized or lime pasteurized substrates including but not limited to hardwood sawdust, straw, and coffee grounds.
Note: Grain spawn must be mixed with bulk substrate before you can fruit it. If you are new to growing mushrooms, we recommend purchasing a book on mushroom cultivation.
Recommended reading:
'Growing Gourmet and Medicinal Mushrooms' by Paul Stamets
'Organic Mushroom Farming and Mycoremediation' by Tradd Cotter
Outdoor cultivation
Oyster spawn can be spread in chopped straw or wood chips as shown in the video below! Making outdoor beds is one of the easiest methods for growing any type of oyster mushroom.
For our complete mushroom beds pamphlet, click here.
Be sure to use clean, untreated products when making outdoor beds.
Storing
If you don't plan to use immediately, you can refrigerate your spawn for up to 4 months.
Cooking
Blue oyster mushrooms can easily replace button mushrooms in most recipes and pair well with many cuisines and flavors. Like all oyster mushrooms, they retain water and may develop a viscous texture when under-cooked. If you prefer a firm or dryer texture, continue to cook Oysters until their liquid has reduced and cooked off and they begin to brown.
Ingredients
Our grain spawn is USDA certified organic and made using organic cultures from our own culture bank. It contains a blend of locally sourced, organic, and non-GMO ingredients from farms in New England and North America.
Cautions & considerations
If you’re going to consume home-grown mushrooms, make sure to cook your fresh mushrooms thoroughly with heat. If it is your first time eating this species, it is best to start with a small amount to check for allergies, even if cooked.
FAQs
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Reviews
M
This is my first spawn grow.
5-gallon pail, straw, a bit of time and as you can see…success!
A kit is nice and definitely easier but I will be doing this over and over as the volume of mushrooms is fantastic. (And now that I’ve done one I expect the next time will be a breeze.)
Your grow looks great, Mark! Thanks for taking the time to share your experience.
J
Excellent quality spawn. I used it to expand to more blocks and then to sawdust logs. No production yet but I am anticipating pining soon.
Thanks, Jeffrey! We couldn’t do it without customers like you. Thanks for sharing the photo of the beautiful blue oysters.
K
The buckets fully colonized in 3 weeks and started pinning - my first time ever growing mushrooms!!! Delicious!!!
We're so happy everything is working out for you, Kay! Thanks for the great review.
K
I'm a return customer and I love growing any mushrooms, especially blue oyster variety, from the spawn I get from North Spore - always high quality product!!!
Very easy to grow in buckets on my back porch. Here are the pictures after 3 weeks of growth
Wow your buckets look amazing, Kay!! Thank you for sharing. We really appreciate your support.
M
We haven’t gotten a chance to try growing yet but my dad has loved the idea of growing his own mushrooms so i know he’ll love it
J
This was my first time growing in buckets in a grow tent. Was very easy and they did even better after I got a humidifier in the tent! I just harvested my second flush. Very easy!
Your oysters look amazing, Jesse! Thanks for sharing!
R
Good flush. No mold this time. Followed proper sterile techniques and cooler temps.
D
Great, clean spawn. Fast colonizer and produces massive flushes.
E
Got some gorgeous flushes using this grain spawn! This was my first time making my own blocks so I was wary but it was so easy. I mixed this grain spawn with Wood Lovr substrate and it worked out great.
We really appreciate your feedback, Elyssa! We’re so happy you’re enjoying the experience! The team is here if you ever need anything.
T
Very fast and aggressive colonization of substrate.
So amazing to hear, Trevor. We appreciate the great review!
J
I have had excellent results from all of North Spores grain spawn!
Love to see it John! Thanks for sharing.
J
Always helpful and fairly priced. Always made orders right now matter the issue
Your grow looks amazing, Jason! Please reach out if you ever need anything.
S
The mushrooms preformed as expected although I would like to have seen more. I was hoping to grow enough to dry. I will keep trying.
M
This year I tried the blue oyster grain spawn in a bucket and was not disappointed! I'm always amazed at how easy and awesome mushroom growing can be. North Spore makes it super easy with the bucket growing kit too. Love it!
E
My third time ordering from here. This time it wasn't to give as a gift. Love that they give you guides to grow. Can't wait for my mushrooms to fruit!
S
My Grain spawn got cooked during shipping at the hottest time this year and was ruined. Staff were friendly and able to make it right, even tho the weather was out for me!
Thanks for sharing, Sharon! We appreciate you taking the time to share your experience. Please reach out if you ever need anything.
J
On flush 3 - was so vigorous it pushed the bottom off my bucket!
That's amazing, Jonathan! Thanks for sharing!
D
North Spore is a great company to work with. They have highly knowledgeable staff and great customer service. Their products are some of the best on the market, the mycelium is strong and does not waste time growing! Love North Spore!!!
We truly appreciate your support! Thanks for the great review!
L
For my first growing experience, it was made extremely easy by this great spawn. I used it over the course of a few months for several grows, and it worked every time.
Wow, Levi! Your oysters look amazing. Thanks for sharing your review!
J
So excited to get started!!! Packaging was perfect and the instructions are so helpful!!!
Thanks, Jessica! Our team is here if you need anything.
M
Very quick shipping and the grain spawn was covered with mycelium. Happy harvest to me!
J
Stuff works great
Thanks for the great review, Jason! We really appreciate your support.
m
Always happy with the blue oyster spawn it's ready when delivered.
We so appreciate the great review, Michael! Thanks for sharing!
W
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.
We're so happy you're enjoying the experience, Wayne! Please reach out if you ever need anything.
j
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.
Fantastic, Jill! If you need help with anything, please reach out.
J
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.
Thank you so much for the awesome review, James!
M
Clean and intact spawn, would order again.
So great to hear you are pleased with the spawn, Michael! Don't hesitate to reach out if you ever need anything!
M
The grain spawn arrived fully colonized and ready to use. I have inoculated several bags from this purchase and all have had vigorous spawn runs and produced solid fruit. I am somewhat new to mushroom growing and have only recently learned there are warm and cool strain blue oysters. As I live in a hot climate, I was curious to see I could find out what strain these might be and see if that could help me fine tune my environment. These are an excellent regardless of the strain and I will continue to purchase form North Spore. Thank you!
Thank you so much for the thorough review, Matthew. We so appreciate it. Reach out if you ever need anything!
S
Good
Good luck with your grow, Sufang!