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PF Tek Mushroom Cake Substrate Jars - half pint regular mouth , sterilized

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Made to order, usually ships within 2-5 days.

Product Description

Attn: This formulation is supplied in regular mouth half pint jars. Every bit as good as the wide mouth version, just taller and narrower. They still have a taper, your PF cakes can be "birthed" normally and will easily slide out. What's the difference between the two? Not much. The Original PF tek was based on the wide mouth jars, but some people found they liked the taller and narrower jars because more could be placed in the same fruiting area. We offer both, so you have your pick!


The PF Tek: a recipe and method that revolutionized amateur mushroom cultivation. Here we have half pint regular mouth jars filled with the traditional PF Tek mixture of organic brown rice flour, vermiculite, and water. Our jars are guaranteed fresh and sterile and come with four cleanly drilled and taped holes in the lids for easy and fuss-free inoculation.

Following the basic PF Tek recipe, clean bottled water is mixed with organic brown rice flour and grade 2 medium grain vermiculite. A dry vermiculite layer tops off the mixture. Although the original recipe didn't call for it, our jars are then sterilized using our steam and pressure sterilizers, allowing us to guarantee them free from contamination.

The jars are shipped with four cleanly drilled and taped holes in the inverted dome lid. The clear tape allows for easy, fuss-free inoculation. The process and methods for making your own PF Tek Jars is illustrated with great explanation and detail in the Let's Grow Mushrooms! - 2 DVD Set by Marc Keith.

This basic PF Tek recipe will support the mycelium growth of a wide variety of mushroom species. It makes a great basic fruiting cake for oyster mushrooms. Try a variety of cultures in this substrate, or use the colonized cakes as spawn in wood chip beds for establishing outdoor mushroom garden patches!

History of the PF Tek: In the early 90's Robert McPherson, aka Professor Fanaticus, introduced the world to The classic PF Tek recipe for substrate preparation. The process revolutionized amateur mushroom cultivation, allowing easily accessed ingredients to be mixed and sterilized using commonly available equipment. Simple rice flour is mixed with vermiculite and water and loaded into half pint wide mouth jars. The jar mixture was able to be sterilized reasonably well using a large stock pot with boiling water.

Note to local customers: to ensure freshness, most of our sterilized substrates and media are prepared to order. As a result we do not stock these items on our shelves, or place them into cold storage. Rarely, we may have a handful left over from the day's run, but please call ahead of time to ensure we can prepare them for pickup.

Note to International customers: due to increased exposure and potential of longer transit times, we can not extend our standard replacement guarantee to customers receiving this product outside the USA. You may still place an order for and receive this product, but you will receive it "as is," without claim to replacement material should you experience contamination or failure.

Priced per jar, see below for quantity pricing information.

Made to order, usually ships within 2-5 days. While our PF Tek jars are guaranteed to arrive sterilized and free of contaminants, they are still somewhat perishable. Please use jars within 10 days of receiving your order. We are unable to offer replacements for unused jars after that time frame.