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Our Vermicomposting facility is located just South of Steinbach, Manitoba.  Where winter temperatures routinely plummet to -30 celsius and summer highs can hit plus 35.  Dealing with a 60 degree temperature variation has been challenging to say the least.  This is one of the reasons we use cattle manure to grow our worms and make our worm castings.  Manure composts at a fairly high temperature and helps the worms survive winter.  Our composting project is planned on a three-year rotation, with new manure introduced in the Autumn of each yearly cycle.  The new manure is introduced in Fall as night-time temperatures drop in order to attract worms.  During the warmer temps of day, the worms move to colonise the hot compost of the new manure.   The vermicast is harvested from the three-year old manure piles, almost entirely made of castings after being consumed for 2 years by worms.  As you can see from the photo, we use straw to insulate and act as bedding for our worms.  We often wonder if our worms haven’t acclimatized to these temperature extremes, they have been living in Manitoba for over 25 years.  Think of the thousands of generations that have lived through our cold winters and scorching summers.

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