Blue Oyster Mushroom Liquid Culture - 10ml

Pleurotus ostreatus | Harbor Blue Strain

Grow dense, cascading clusters of rich blue-gray mushrooms with our vigorous Blue Oyster strain. Known for its productivity and adaptability, this Pennsylvania-born variety thrives in cooler temperatures but still performs beautifully year-round. It’s fast, beginner-friendly, and one of the most rewarding oysters to grow at home.

Each syringe includes ~10ml of live liquid culture, sealed in a sterile sleeve with a 16-gauge needle and alcohol wipe included.

Why Grow Blue Oysters?

Blue Oysters are a top choice for both commercial and hobbyist growers. Their meaty texture, savory flavor, and eye-catching color make them a kitchen favorite, while their aggressive colonization and generous yields make them a cultivator’s dream.

Strain Performance

• Beginner-Friendly: Forgiving and fast-growing with a wide fruiting window

• Efficient Colonizer: Grain typically colonizes in 10–14 days at 68–75°F

• Cool-Climate Champion: Ideal fruiting temps range from 55–70°F (13–21°C)

• Robust Fruiting: First flush appears 10–14 days after substrate colonization

• High Yields: Expect 1–2 lbs on the first flush from a 5 lb supplemented sawdust block

• Versatile Substrate: Performs well on pasteurized straw or sawdust

How to Use

• Refrigerate on arrival for optimal viability (shelf life: ~2 months)

• Shake thoroughly to distribute mycelium before use

• Inoculate sterilized grain bags or jars via a self-healing injection port

• Use sterile technique in a still air box or flow hood for best results

• Once fully colonized, transfer to your chosen fruiting substrate

• Maintain high humidity and fresh air exchange during fruiting

Includes:

• (1) 10ml Blue Oyster Liquid Culture

• (1) Sterile 16-gauge needle