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PF-Tek Jars³ Grow Kit


Sterilised at 15 PSI in an electric autoclave.
Processed and bagged within an ISO Class 5 cleanroom.
One of the quickest ways to grow thousands of species of mushrooms..

This beginner friendly grow kit comes ready to use, in easily reusable glass jars!
PF-Tek is a true classic and much-loved substrate of many Mycologists.

All grow kit products are for UK customers only at this time, sorry.

Would you like 3 smaller tents instead of 1 big tent?

What’s included

  • 3x Half-Pint Glass Jars of Organic Brown Rice Flour with added Vermiculite, Gypsum and Coffee
  • Injection holes within the lid (the original PF-Tek method)
  • XL Ultra Humid Breathable Grow Tent to fruit your mushrooms inside
  • Hygiene Kit includes sterile gloves, alcohol wipe(s) and a hand wipe
  • Perlite to maintain the perfect humidity level throughout the mushroom fruiting process
  • Vermiculite for creating the perfect surface micro-climate

Not included

  • Gourmet Spore or Culture Syringe


If you cannot use your grow kit right away, we would advise that you store it in a (clean) fridge for a maximum of 2 weeks.
If you can’t store it in a fridge, don’t leave it for any longer than 1 week.
The longer you leave it, the more moisture will be lost from the substrate and if too much moisture is lost, colonisation will just not happen.

Always inoculate your grow kits as soon as you possibly can!

Click the ‘Instructions’ tab above to read our detailed guide


  • This grow kit is tailored to first time growers who want fast flushes.
  • Can take around 5 weeks to fully colonise in optimum conditions.
  • Some wood-loving species like Shiitake may not fruit on this substrate.


All grow kit products are for UK customers only at this time, sorry.
Product is made fresh to order – Please check our dispatch schedule here.
Only for use in cultivating species which are legal to grow – research the law.