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Sterilised manure compost & soy hull substrate ready for inoculation. Our compost is a blend of locally-sourced manure based compost, supplemented with soy hulls. It has been heat-sterilised for 8 hours and sealed in a filter patch bag. 


This is substrate used for final stage mushroom production - also known as "bulk substrate".


This blend gives superior consistency while maintaining density and moisture retention for rapid colonization and high yields. It is suitable for all dung-loving species of mushrooms such as Agaricus (button/ portobello). 


We recommend inoculating this substrate with grain spawn -- it is generally not recommended to inoculate compost substrate with liquid culture, agar or spore syringes. A grain spawn rate of 10-50% is  recommended, spawning rates of up to 50% can be used to reduce risk of contamination and speed up colonisation time.


If you have your own agar culture, liquid culture or spore syringe and want to make your own spawn checkout our >> sterile grain here.


This product does not come with any instructions.

Sterilised Compost Block 2KG

  • Sterilised and sealed in a filter-patch bag -- sent out in 2.2kg bags.

    SporeShift ships by NZ Post courier - shipments are trackable.

    Shipping is a flat rate of $5 NZ-wide - or FREE for orders over $40.

  • If your sterlised compost appears contaminated upon arrival, please email us a photo before opening (include the batch number - found on the top of the bag - in the photo). If contaminated, we will replace it!

    (Contamination happens very rarely -- but can occur if a bag is punctured during freight).