Bob's Your Uncle™ Sterlised Wild Bird Seed Grain bags.

Our perfectly hydrated and sterilised  Wild Bird Seed grain bags for expanding your mushroom spawns.

• 1, 2 pound bags
  
• 450, 900 gram bags
  

Our WBS are perfect for standard expansions of spawn. They break up uniformly to help with even distribution of mushroom spawn media. WBS grains have a good nutrient profile and water moisture profile, containing  wheat, corn, sunflower and millet. Our WBS is also malted to release sugars to help mycelium thrive. The transparent bags are perfect for viewing the spawn and are not full, allowing easy manipulation and breaking up of the spawn. The air exchange filter allows oxygen in and carbon dioxide out while retaining moisture and reducing contamination.

We now have two kinds of filters for our grain bags. Our standard is the 10 micron filters. This has worked fine for us but some customers have requested 2 micron filter bags. The 2 micron filter reduces contamination, including the smallest such as trichoderma so largely stopping all contaminants, though this slows the growth of mycelium as oxygen exchange is reduced compared to our 10 micron bags.

If you have a HEPA filtered, positive pressure set up or a similar system where you can be sure that the air around the grain bags is hygienic, then the 10 micron bags will be better as the air exchange will be faster and growth of mycelium will be faster. However, if you are growing in your home without controlled air conditions, I would recommend the 2 micron bags. These can be selected in the Bag Weight selection options.

Why choose Wild bird seed as the grain for your mycelium spawn? 

Wild bird seed is a mix of various grains. This increases the nutrient profile of the grain feed for mushroom mycelium, increasing yields. This is opposed to the use of various mono grain yields.

A study into single grain substrate showed different growth rates for different grains with oyster mushrooms.