top of page

Hydrated lime for pasteurizing straw, gorse or sawdust for growing oyster mushrooms.


This hydrated lime is low in magnesium, high in calcium and raises PH. Other types of lime - such as garden lime or dolomite lime - are high in magnesium, & will not work the same.


This is for use with a simple cold-water method of pasteurisation -- which is a cheaper safer alternative to heat pasteurisation. 


For straw soak use 2-3g/L. Soak straw for 12-24hrs, drain for 4-12 hours, mix in spawn and bag into straw bags with pre-punched holes.


>> Read up all about how to grow oyster mushrooms on straw here


Please Google "Hydrated Lime Safety Precautions" and read before use. Hydrated lime can cause burns to skin and eyes in its powdered form if handled incorrectly.


Hydrated Lime

  • SporeShift ships by NZ Post courier - shipments are trackable.

    Shipping is a flat rate of $5 NZ-wide - or FREE for orders over $40.


"Excellent service!

Sporeshift have consistently got the best service of any online provider I have used. From the time of order to delivery the communication is great. I frequently wonder why other businesses can't to it the way they do. Excellence in action. And no, I am not their mother ... just a satisfied customer and mushroom lover. :)"

"Loving watching the magic of the growth cycle and increasing our own food security and self reliance in the process! My kindy wildlings are loving the video updates of how they're going each day! Excited to extend my varieties next. Oysters were definitely a winner on a magenta spreen, thyme, white sauce and olive pizza tonight!!"

Stacey Young

Related Products