Organic Italian Oyster Mushroom Grain Spawn

$29.99

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USDA Certified Organic

USDA Certified Organic

Trusted by 350K+ Growers

Trusted by 350K+ Growers

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Our USDA-certified organic Italian oyster (Pleurotus pulmonarius) grain spawn features a strain with a deliciously mild flavor and earthy aroma. Italian oyster mushrooms are thicker and meatier than blue oyster mushrooms, and their brown frilled caps can grow quite large. They are great for beginners and are reliable indoor year-round producers. If kept in the right conditions, they will yield substantial first, second, and even third harvests (making them an ideal commercial variety!)

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

Recommended use:

  • Italian 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. Italian 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 65-75°F  |  18-24°C
Humidity (Phase 1: Primordia) 95-100%
Humidity (Phase 2: Fruitbody) 85-95%
CO2 Sensitivity (Phase 1: Primordia) <800 ppm
CO2 Sensitivity (Phase 2: Fruitbody) <800 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

Italian Oysters 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 undercooked. If you prefer a firm or dryer texture, continue to cook them 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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Frequently Asked Questions

No, grain spawn is not an all-in-one kit and cannot be used to fruit mushrooms out of the bag. Grain spawn must be mixed with bulk substrate before you can fruit it.

Grain spawn can be used in a wide variety of ways including indoor growing, outdoor growing, or to make more grain spawn. (Grain spawn can be used to make plug or sawdust spawn, not just other grain spawn.)

  • Indoors, you can mix grain spawn with bulk substrate to grow in bags, in containers, or to create fruiting cakes.
  • Outdoors, you can mix grain spawn with straw or wood chips to make beds and containers. (Note: Grain spawn can not be used for logs.)
  • A grain-to-grain transfer allows you to extend the life of your grain and create more grain spawn.

Our grain spawn is a proprietary blend that features nutrient-rich organic millet and wheat berries.

Cluster of brown-capped mushrooms with long, light-colored stems against a white background.

Your Trusted Source for Premium Mushroom Growing Supplies

Whether you’re growing mushrooms at home, in your garden, or at a commercial scale, we offer everything you need to cultivate success. We start with the highest-quality OMRI-listed ingredients, mix them in our state-of-the-art facility, and inoculate them in our custom-built lab, so you can rest easy knowing your product will yield the best results.

Reviews

  • 5 stars: 48 (98%)
  • 4 stars: 1 (2%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
L
Laura Young
Fruiting quickly

First, let me say it is now August and all my oysters from March's spray and grow boxes have been happily fruiting in my yard for months (those boxes are basically a gateway drug lol). I added fruiting blocks to expand the species and those fruited quickly and before long I was realizing I needed mycelium sitters to take care of things for me when I traveled so...out in the woods with those as well! We have a wooded acre.
Half my body weight is now oyster mushrooms, I think.
Because the little soil bugs and slugs really like them also (coffee grounds help) I thought I would try container growing in straw so that's why I purchased this spawn and I'm already harvesting and so far the slugs have not caught on to my game. Delish!

Your review made our day, Laura! Please reach out if you ever need anything.

J
Janine
Love these mushrooms, so tasty!

These mushrooms are a real gourmet experience; they are mild and delicious.

Congratulations on your Italian Oysters! We appreciate your review.

J
JUSTIN LEINS
Great Flush

Grew them in my garden. Two weeks to harvest.

Great harvest in great time! Congrats, Justin.

J
Janine
Favorite mushroom

These may be my favorite mushroom. They are easy to grow on straw and so rewarding and tasty.

J
Jason Keene
Love it

This stuff is great. I love it.

J
Jason Keene
Great spawn

The spawn is great grows very well

P
PM Holcomb
I keep coming back for more

Great! All of NS's oysters are reliable producers, and the Italian's might be my favorite for flavor and texture.

M
Michael

Still in the fridge but if it performs like the Pink oyster I'll definitely be happy.

M
Maureen
Fantastic results

This is our second time buying from North Spore. Last year we seeded two beds of Wine Caps which flushed 4-5 times and were fantastic. This year we added three laundry baskets of Italian Oyster spawn. As you can see, this is a resounding success. Great company, great spawn, so easy to be successful and forage at home when you cannot get out to the woods!

Thanks so much for sharing, Maureen! Your Italian oysters look amazing.

N
Nicholas
Awesome spawn

I got this a couple months ago. Planted it a few weeks ago and wow!!! My first batch was a decent size. Then there was rain for a week and the second batch was much larger.

Your grow looks amazing, Nicholas! Thanks for taking the time to share your review!

T
Toni
So easy!

Literally the easiest to grow! Newest addiction!

We're so happy you're enjoying the experience, Toni! Thanks for the great review.

B
Beth

I gave them for a Christmas gift. They are excited.

Awesome, Beth! Thank you for sharing.

H
Hiroshi Morimoto
Successful Italian Oyster Mushroom in Buckets

I received an Italian oyster mycelium in grain in the first week of September and prepared the buckets (4) and straw with lime (ph 12.7 soaked and drained to 70% hydrated) following the video instructions. Wow! In 2 weeks I had the first flash of Italian oyster in all four buckets! One week rest and I had another flash (not as much). The photo attached is from the first flash. This was so much easier (faster and cleaner) than doing it outdoors on straw bed. Going forward, I will continue the bucket method.

We're thrilled to hear that bucket tech has worked so well for you! Thanks for taking the time to leave a review.

R
Robert
Third harvest

Allentown Pennsylvania area is where we live. I established two beds of this product at the end of April. This week we have our third harvest of Oysters! We had to protect it from slug damage using small containers of cheap beer. That took care of the slugs that ate our second harvest before we could gather much. This third harvest filled two large mixing bowls, and the taste is wonderful. Highly recommended. Using straw and wood chips in an existing shaded landscaping bed that has a mix of river birch and low light plants.

We're so happy the Italian oysters worked out, Robert! Thanks for taking the time to share your experience.

K
Kim Schmitz
Oysters Italian

This was easy and fun to grow. I placed in a bed by itself with minimal sun. 2 weeks in I started to get one or two here and there. Now after some rainfall they have taken off! Couldn't be more happier with the product!

Awesome photos, Kim! Congrats on your successful grow.

M
Marlette Cullen
Italian Oyster Mushrooms

Today was the 2 week mark and time to open the two 5 gal. Buckets and take a look. I was worried because one night the temperature got down into the 40’s and my buckets were in the garage. I brought them in the house and have been spraying the buckets 3 x a day as suggested. We are still having very cool nights, so think I will keep them here until the weather moderates. I have enjoyed messing with them!! Thank you for getting me started. I am 82 and can’t garden like I used to, but hopefully I can grow mushrooms. I love this variety !! Will write again when they “pin”. Marlette Cullen in Northwest NC, Blue Ridge Mts.

Hello Marlette,

Thank you so much for taking the time to leave such a lovely review! We wish you luck with your grow and we'll be here in case anything comes up.

F
Feather
Late to the party but what an entrance

I’ve been growing oyster mushrooms outside in a bed made up of straw. It has really turned into kind of a delightful way to add mushrooms to a lot of our meals without too much stress. I started in the winter with blue, Italian and popham elm oysters. I never saw any of the last ones.

This was a pretty low-effort project so I had low expectations. We already have straw because we keep livestock. We also have lots of large branches that could be used to create some airflow under the straw.

It wasn’t an immediate success. First I tried using straw that had already been “used” by the Goats. This isn’t a good way to grow oysters.

I do expect that bedding with manure will work well with other varieties, such as the almond agricarus. We also naturally grow meadow mushrooms this way. Meadow mushrooms, like almonds, prefer an environment that already has a fair amount of microbial activity.

If you’ve never heard of meadow mushrooms they look a lot like common store bought brown ones. They like manure. Back when everyone rode horses they were everywhere! We often find them in our garden beds, which are made of composted bedding from the goats. I wish we could find a source for the mycelium to grow them on purpose.

Anyhow, at first, the Popham Elm Oysters did not show up. This was totally my fault as I didn’t want to use fresh straw. The mycelium also seemed to struggle with our crazy weather

So I switched to fresh straw. I created a covered bed with an old chicken tractor draped with shade cloth. Then put this in a shady spot. The pink oysters immediately made an entrance in late spring when it warmed up.

I started seeing these other mushrooms that were white, very different from the pink oysters. I had to look them up to identify them as the Pophams I had tried unsuccessfully to grow before. Both varieties are now about to produce their first flush!

The blue & Italian oysters fruited repeatedly just until the temps got too warm.

We really appreciate you taking the time to share your experience, Feather! Our team is here to help if you ever need anything.

K
Kristina Gressley
Beautiful and lasting

These were easy to grow with beautiful wavey edges. They are hearty and seem to hold up better in the refrigerator than many other mushrooms.

We really appreciate you taking the time to share your experience, Kristina! If you need help with anything, please reach out.

S
Sarah H.
Wonderful!

My Italian Oyster's turned out so well. These were only my second time trying to grow and they were very successful. Thank you so much for a great product!

Thanks for sharing, Sarah! We're so glad everything is working out for you. Our team is here to help if you ever need anything!

C
Cristian

Amazing results. The quality of the product and friendly customer service is amazing. Definitely will keep purchasing.

T
Thile

Good I like that

D
Deborah Bennett

Awesome spawn

D
Deborah Bennett

Love my Hardee growing Italians!

M
Michael Domeraski

Top quality!

K
Karl Wenner
First time grow, fantastic!

Healthy spawn for my first bucket grow, Went like clockwork.Going strong at nearly 4 weeks. Not quite as much biomass as the blue oysters I got at the same time but tastier!

Thanks for sharing, Karl! We really appreciate your support.

K
Karin Garten
Love it!

This is an easy to grow, very prolific strain. It's fast fruiting and the mushrooms are big, beautiful and meaty. It's a favorite at the market.

Thanks so much for sharing, Karin! Your mushrooms look incredible! Please reach out if you ever need anything.

b
byron gabel
Nice clean spawn!

I like the millet for spawn. It has a lot of inoculation points and colonization is quick. We are a commercial farm that occasionally needs to supplement our operations with spawn from other farms. Notthspore never disappoints.

B
Bart Noble
Yum!

I bought these along with yellow/golden and pink oyster grain spawn. This variety is my favorite of the three.

Big caps and nice stems that easily "shred" into almost noodles. They have a great flavor!