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Blue Oyster Mushroom Grow Kit, 5 lb Ready-to-Fruit Block

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5.00 stars, based on 7 reviews 7 review(s). | Write a review
  • Fully colonized 5 lb block of first-generation Blue Oyster (Pleurotus ostreatus var. columbinus)
  • Cut, mist daily and expect pins within about a week
  • Fruits at 55–80°F; cooler rooms give the deepest blue-gray color
  • Up to 2.5–3 lb of mushrooms across multiple flushes
  • Includes an ultra-fine pump mister and printed instructions
Retail: $29.99
Price: $21.99
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    Item #: BOY5
    Availability: In Stock
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    Blue Oyster Mushroom Grow Kit, 5 lb Ready-to-Fruit Block blue oyster mushroom grow kit, blue oyster grow kit, oyster mushroom grow kit, ready to fruit mushroom kit, pleurotus ostreatus, mushroom growing kit, beginner mushroom kit

    Blue Oyster Mushroom Grow Kit, 5 lb Ready-to-Fruit Block

    Price: $21.99

    Our Blue Oyster grow kit is a 5 lb block already fully colonized with first-generation Pleurotus ostreatus var. columbinus. Cut the bag, mist daily, and dense blue-gray clusters start forming within days. It's one of the fastest, most forgiving gourmet kits we make, and the one we suggest for a first grow.

    • 5 lbColonized block
    • 2.5–3 lbTypical yield
    • 55–80°FFruiting temp
    • MultipleFlushes
    • BeginnerSkill level

    Why grow our Blue Oyster kit

    Fast and forgiving

    Pins often show within the first week, and it fruits at ordinary room temperatures.

    Cold tolerant

    Handles cooler rooms better than most oysters, and cooler air keeps the blue-gray color deepest.

    A kitchen workhorse

    Mild, savory and faintly nutty. Holds up in a hot pan for stir-fries, pasta, soups and tacos.

    How a ready-to-fruit kit works

    The hard parts of mushroom growing (sterilization, inoculation and colonization) are done before the block ships. Your job is to trigger fruiting and keep the surface from drying out.

    1Cut the bag

    Make one slit across the face of the block as shown in the instructions. Fresh air on the mycelium is the signal to stop feeding and start fruiting.

    2Mist daily

    Lightly mist the cut face once or twice a day with the included mister. Keep the surface from drying out; don't leave standing water.

    3Air and light

    Give it about 10–12 hours of indirect light a day and good air exchange for clean, well-formed caps.

    4Harvest and rest

    Twist off the whole cluster before the caps flatten out. Then stop misting for about a week to let the block rest before the next flush.

    Cooler is better for color: Blue Oyster fruits anywhere from 55 to 80°F, but the blue-gray is deepest and lasts longest at the cool end. Warmer rooms still fruit fine; the caps just fade toward gray-tan sooner.

    Blue Oyster kit specifications

    SpecDetail
    SpeciesPleurotus ostreatus var. columbinus
    Block5 lb, fully colonized with first-generation (G1) genetics
    In the box5 lb fruiting block, ultra-fine pump mister, printed step-by-step instructions
    Expected yieldUp to 2.5–3 lb wet weight across multiple flushes
    Fruiting temperature55–80°F
    LightIndirect light, about 10–12 hours a day
    HumidityMist the cut face 1–2 times daily
    FlushesMultiple, depending on conditions
    Fresh airGood air exchange for clean, well-formed caps
    Skill levelBeginner; no sterile technique or equipment needed

    Get more from your kitA Tabletop Humidity Tent holds moisture around the block so you mist less and get fuller clusters, especially in dry winter air. Ready to grow Blue Oyster from scratch? Start with our Blue Oyster liquid culture syringe.

    Frequently asked questions

    How long until my Blue Oyster kit starts fruiting?

    Pins often appear on the cut face within the first week and size up quickly over the next several days. A spot at 60–75°F moves fastest. If nothing forms after two to three weeks, the block is almost always too dry: mist more often, not more heavily.

    Do I need a humidity tent or a special chamber?

    No. The kit is designed to fruit in open room air with daily misting. In dry homes, especially in winter with forced-air heat, a humidity tent holds moisture around the block so you mist less often and get fuller clusters.

    How many harvests will one kit give me?

    Most blocks give multiple flushes totaling up to 2.5–3 lb wet weight, with the first flush usually the largest. Rest the block for about a week between flushes.

    Why are my mushrooms turning more gray than blue?

    Some fading is normal as Blue Oyster matures, and warmth speeds it up. For the deepest color, fruit toward the cool end of the range and harvest as soon as the caps are developed, before the edges flatten.

    Can I grow it outdoors?

    Indoors is strongly preferred. The block needs steady temperatures and protection from wind, direct sun and insects; fungus gnats find an exposed block quickly. A kitchen counter, bathroom shelf or any spot out of direct sunlight works well.

    What's the difference between this kit and Blue Oyster liquid culture?

    The kit is already colonized and ready to fruit, so there's no sterile work. Our Blue Oyster liquid culture syringe is for growers who make their own grain spawn and want to scale up or run multiple grows.

    Overall Customer Rating of 7 Reviews:
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    GA

    Great product (blue oysters)

    Rating:
    review-star review-star review-star review-star review-star
    Pros:
    • Price
    • colonized
    Cons:
    Great shipped fast and was fully colonized when it arrived, I ordered once from blooming acres and it came in as some loose grains with a little mycelium on them Midwest is my go to now

    Awesome and Quick Grow

    Rating:
    review-star review-star review-star review-star review-star
    Pros:
    • Delicious and quick aggressive strain
    Cons:
    I love the pre colonized blocks super easy. The Blue oysters also one of my faves super quick strain. These ones are super aggressive and I cannot wait to eat these bad boys. Picture provided is only 10 days old
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    Blue Oyster Kit

    Rating:
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    Pros:
    • Easy to use
    Cons:
    Besides me suffocating the poor thing in a monotub for a few days, the kit has flushed insanely well and am eager to harvest and get a proper second flush that hasn't been thwarted by CO2. Will definitely be buying another gourmet grow kit from Midwest, maybe the lions mane for some killer jerky.
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    Pittsburgh, PA

    One Of Three Kits For First Time Grower

    Rating:
    review-star review-star review-star review-star review-star
    Pros:
    Cons:
    The Blue Oyster kit was one of the three kits for my first time grow. The kit came well packaged and was ready to take off upon arrival. I placed the kit in a Martha tent on 10/30/22 and the first signs of pinning came on 11/03/22. These babies grew fast and furious, by 11/08/22 they were ready for harvest. First flush produced 24.1 ounces of delicious mushrooms.

    I noticed the pinning for the second flush on 11/17/22. At the time of this review, I have not harvested the second flush.

    Very happy with the quality, shipping speed, and products I've received from Myco Labs.

    Large Yield

    Rating:
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    Pros:
    Cons:
    I have had great success with these grow kits. The Blue Oyster is my favorite- fruits quickly, tastes delicious, looks beautiful! I'm so glad that I found Myco Labs. I ask a lot of questions and I always receive great information and tips. I look forward to buying more from this company as I advance through this hobby.