Garfield Bullock 16/03/2026 Garfield Bullock 16/03/2026

Substrate & Preparation: Foundation of Mushroom Growing Success

All-in-one method: Inject liquid culture into the grain layer at the bottom of the ${growBag}. Allow the grain to colonise, then break and mix it through the hardwood substrate inside the sealed bag.
Separate method: Inject liquid culture into the ${grain}. Once fully colonised, mix that grain spawn with the ${bulk}.

Learn how to choose and prepare mushroom substrate for Oyster, Lion’s Mane, Shiitake and other gourmet species. This complete guide covers straw pasteurisation, supplemented hardwood, field capacity, sterilisation and the correct use of liquid culture and grain spawn.