All Jars and Spawn Bags are prepared fresh and meant to be used within 4-6 weeks of receiving the items. You can extend the shelf life by a few weeks by placing items in the fridge or storing in a cool dark place.
What substrate is best for mycelium?
A good substrate is dense in woody, fibrous materials like lignin, cellulose and hemicellulose. (These contain a lot of carbon, which is the main food source for your mycelium.) Here are a few important things to keep in mind when choosing a substrate: Your substrate needs to have 1 to 2 percent nitrogen.