Our blue oyster (Pleurotus ostreatus var. columinus) grain spawn is a superb choice for both newcomers and seasoned growers. This variety is fast-growing, quickly producing bluish-grey mushrooms with a rich umami flavour that adds depth to any dish.

These mushrooms are great for indoor growing throughout the year, adapting well to a range of temperatures and thriving in cooler ones. Their hardy nature and need for ample fresh air also makes them ideal for outdoor growing.

Blue oysters are prolific producers, often yielding several large flushes. Notably, they're capable of achieving up to 200% biological efficiency! (200% = 2kg of fresh mushrooms per 1kg of dry substrate).