The mushroom spawn is any constituent that has been injected with mycelium – vegetative growth of a fungus. Mycelium is a thread-like collection of cells, to mushroom-like an apple tree is to an apple. You must own one as a base for cultivating other.

The spawn is used for transferring mycelium onto any material from which mushrooms will grow, called a substrate. There are plenty of substrates, straw, cardboard, logs, and wood chips; these are some best examples.

Types of Mushroom Spawn

Any mushroom constituent with mycelial growth is known as ‘spawn.’ However, you’ll usually find that spawn in following types;


Sawdust Spawn is sterilized sawdust which has been inoculated with mycelium, often by grain spawn. The sawdust is normally made of hardwood, with pieces neither too enormous nor excessively fine (a couple of mm in measurement).

It can be used to inoculate logs, pasteurized straw, cardboard, outdoor mushroom beds, and various other substrates. It’s also used for injecting wooden dowels to cultivate a plug spawn.

The con of mushroom spawn in sawdust is the size of particles. Since they are tiny and numerous, it has many inoculation points for the mycelium to grow into the substrate—this outcome in quicker mycelium colonization with less an ideal opportunity for foreign substances to grab hold.

A drawback of sawdust mushroom is, it’s not as nutritious for mushroom development as one might want. Accordingly, you might be frustrated with your yield on the off chance that you attempt to develop mushrooms from straight sawdust. Mushroom growing units produced using sawdust are typically advanced with wheat or some other wellspring of nitrogen to expand yields.


It’s a sterilized grain inoculated with spores or a sterile culture of mycelium. Numerous sorts of grain can be utilized, with rye and millet being probably the most well-known. Different decisions are corn, wheat, and various cereal grains. I’ve even had the best of luck with popcorn!

Grain can make sawdust generate more grain produces or immunize a wide range of sanitized substrates like straw.

A massive benefit of utilizing grain is that it’s substantially more nutritious than sawdust, making it ideal for generating or immunizing indoor substrates. A disservice is that it’s not as great a decision for immunizing outside beds. Yummy grains constitute a significant objective for birds and rodents.


It can said to be considered as a hub or collection of small wooden dowels inoculated with mycelium. This should be possible with sawdust generate or even with stems of live mushrooms.

A benefit of fitting brings forth that it’s exceptionally compelling for immunizing substrates produced using wood or strands. It promptly colonizes cardboard, wood chips, paper, stumps, and logs. A weakness is it’s not generally an ideal decision for straw or grain-based substrates.

Other Types of Mushroom Spawn

  • Spawn can be found in other forms as well such as;
  • Sawdust spawn plugs – Sawdust spawn in the shape of a pin with Styrofoam on the end
  • Liquid spawn – Water contains mushroom spores/mycelia slurry
  • Woodchip spawn – Made with woodchips of different hardwoods
  • Straw spawn – Sterilized straw immunized with mycelium

Which one is The Best Mushroom Spawn?

Phoenix Oyster Mushroom Spawn, Still, the answer depends on for which purpose you need. Certain mushrooms additionally develop better on explicit substrates. Before beginning, research the sorts of mushrooms you need to build to see which substrate to utilize.

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