Organic Blue Oyster Mushroom Fruiting Block

1 of 5 types we ordered and we’re still super happy with these blocks. We’re using an indoor Martha tent set-up. Got a lot of the info for building one right here on this website under the learning tab😎 these blocks are thriving! We have 2 more types to review including the lion’s mane in the picture as well, but I’m sure they will be just as impressive.

Best yield and growth of any of the fruiting blocks I have tried before. I have one block that has fruited 4 times. Amazing product! Highly recommend!!!

Usually have good luck with the blue oyster i dont know what happened but its had mold on it

This was part of the first fruiting blocks I ever ordered. I grow in a martha tent at 90% humidity and 72F. Based on the pictures I expected several smaller clusters. I ended up with a 1.1lb giant lol. I don’t know if it’s supposed to look like this, but I put it in my venison ragout and it was great. Very impressed. What’s really crazy is that it was 2” tall on Friday, I was gone Saturday, and Sunday it was this huge mushroom. Amazing.

Growing these was SO easy once I had my Martha tent set up, and it was so quick??? I wasn’t expecting to have mushrooms ready to eat in like a week. The blue oysters taste better than any I’ve bought at store, and they grow MASSIVE. One of the caps was 4 inches in diameter 😱 I’m obsessed and wanna keep growing these forever

This process is teuly magical to watch!

We purchased a Boom Room 2 back in June of 2025, along with two mushroom blocks. The blocks went into the fridge when we received them, however; the boom room went into the closet. I became ill and landed up in a nursing home. When I came back home, here were our mushroom blocks sitting in our spare refrigerator. We decided to set them up in Jan. We live in the Pacific NW and are known for our 'shrooms around here. After a component went bad (which North Spore sent a new one immediately) we decided shrooming was not for us. Anyway, we put the blue oyster bag outside on our deck with no covering or temp/humidity control. It looked like it was moldy so out it went. Ok, we decided to give it one more try and bought more 'shrooms to propogate. We just started them today. My husband went out to the deck where he had stuck the blue oyster bag in Jan in an old planter. OMG. There was a huge flush of blue oyster mushrooms. I couldnt believe it. AMAZING in my eyes. Now, the excitement of growing them has returned and guess what's for dinner this evening?

Great product. The automated boomer bin makes growing mushrooms very easy. Got 3 nice flushes and trying for a 3rd. Got nearly 20 oz from first flush. Would recommend for anyone looking to grow mushrooms.

Great

Tremendous abundant flushes

Second time buying. Always fruits beautifully

Somehow, with humidity and co2 varying wildly because of inexperience, somehow we managed to grow mushrooms!

We have the mushroom bug now and are determined to figure it all out. We will try it again soon with a little more understanding on growing and another grow bag from North Spore.

I have gotten so many off these I don't even know what to do with them all! I moved the blocks to my garden and they continue to produce in my beds now! Love it.

Totally thrilled. First flush was 1.3 pounds. Second flush was almost 1.5! Waiting to see if I get a third, and will break up the block into my garden and light a candle :-)

(Never expect anything, but always surprised when that works out)

Just picked my first flush and going for another. Im excited to try a few recipes with all my new mushrooms.

This was one of two fruiting blocks that began my growing experience with from NORTHSPORE and I must say this is an absolutely incredible strain they offer! I had JUST removed some dehydrated browning little spouts from this block to start it fresh again and it has ALREADY began fruiting this much from nothing in like 2-3 days. This is an extremely fast growing and amazing block! You get way more than you pay for so I consider this block one of the best bargains!!! I am so excited for this next flush, it’s going to be amazing!!!

Great experience, would recommend.

Awesome product, the blue oyster block produced nearly 20 ounces of mushrooms on the first flush.

The pictures of actual mushrooms I’ve attached is from the first flush. The pictures of the pins are from my current second flush. These are by some incredibly easy to grow mushrooms as well as delicious! I’ve harvested and eaten a majority of the first flush while sharing it with other friends. Everybody likes them! Just follow the instructions from North Spore and you will get great success from this block!

For this mushroom I grew from a block, it was incredibly simple to do. I followed the instructions with how to set it up and simply put it in my MONOTUB and waited. I paid attention to humidity but it didn’t take long to get pins, almost like sprouts on a potato to form. After that it was a little wait but the only thing I had to do was keep the grow environment moisture at a good level. When the sprouts start to form tubes with a dark cap at the end, I know I’m going to have a nice harvest coming! I’m on my second flush already!

These mushrooms took a little while longer to produce than my Shiitaki block, however, they produced an incredibly bountiful fruiting. They are probably the easiest to harvest since you just need to twist the cluster at the base to pop it off like a kind of mushroom bouquet. My personal experience I saw many tiny sprouts where more clusters are coming. This is one of the most delicious mushrooms I’ve ever had. Highly recommend!!!

Awesome kit and easy to use. Unbelievable how many mushrooms were produced!

These were so easy to grow and produced three flushes.

Our first block to fruit and it did marvelous! We are on our 3rd flush. Very good mushroom and very versatile.

This was my first experience with a fruiting block. I harvested 24 ounces on day 11. I misted daily and kept a humidifier nearby. I'm excited to see how the next block does in a more controlled environment/monotub.

Five days into putting these blocks into my Martha tent set up and it's like they grow by the hour!!!

Beautiful pins. This block pinned a bit slower than some others but, had a beautiful bouquet/canopy of mushrooms when they came through and pinned again with a few days!

Showed up ready to go!