All of our grain spawn is sterilized in a commercial-grade autoclave. We also verify sterility using biological indicators and temperature sensors.

Grain spawn can be used in a wide variety of ways including indoor growing, outdoor growing, or to make more grain spawn. (Grain spawn can be used to make plug or sawdust spawn, not just other grain spawn.)

Indoors, you can mix grain spawn with bulk substrate to grow in bags or in containers

Outdoors, you can mix grain spawn with straw or wood chips to make beds and containers. (Note: Grain spawn can not be used for logs.)

A grain-to-grain transfer allows you to extend the life of your grain and create more grain spawn.

Unfortunately, mushrooms don’t fruit well off of just grain. Though some mushrooms may eventually grow off grain spawn, the yields will be very small. It's much better to use it to inoculate other substrates.

Most mushrooms prefer to fruit off of grain mixed with substrates like manure, hardwood, sawdust, compost, or straw. (Fun fact, oyster mushrooms will grow on all of these! )

It depends on what your mushroom species prefers. The most common fruiting substrates hardwood sawdust and rice straw.

Our grain spawn can be stored for up to 3 months in the refrigerator.

Note: Our pink oyster spawn is not cold-tolerant and cannot be refrigerated. Best to use as soon as possible or store at room temperature for up to 5 days.

Best practice is to plan on using all of your grain spawn bag once the bag is opened. Attempting to store it for prolonged use after it has been opened will most likely result in contamination.

All of our grain is fully colonized upon shipment. Some species we offer including Lion’s Mane and Pink Oyster typically have a faint or light mycelium and look uncolonized. Rest assured, they are! Your spawn may also look uncolonized if it gets a bit broken up in shipment. (This is similar to how it looks when you break up your spawn to use it)

No, grain spawn is not an all-in-one kit and cannot be used to fruit mushrooms out of the bag. Grain spawn must be mixed with a sterilized substrate before you can fruit it.

We use premium quality wheat grains (Trigo) for all our grain spawn.

Unfortunately, it is difficult to estimate the overall yield of any project batch. This is because there are many ways to use grain spawn, many types of substrates, and every growing environment is unique.

Mushroom spawn will naturally develop a white mold-like layer called mycelium. This branching network of threads is the primary body of fungi, or vegetative structure. (A good analogy is to imagine mycelium like an apple tree, and a mushroom like an apple growing from it.)

Seeing mycelium growing throughout your bag is normal and indicates healthy mushroom spawn. However, if your spawn looks green or black, the culture may be contaminated and should be discarded. You can reach out to us for confirmation.

Healthy spawn bags will have different amounts of mushroom culture visible depending on the species. For example, lion’s mane has a wispy and faint mycelium and looks uncolonized. Often, mycelium is broken up in shipping, so it can appear less myceliated. Let it sit for a few days and it should bounce back.