Pure maple syrup is just that, pure.  It contains absolutely no preservatives or additives.  It is 100% natural and as a result has a shelf life.  Like many other food products maple syrup, once exposed to oxygen will began a natural chemical reaction which will slowly deteriorate the syrups flavour, colour and overall texture. 

For many people this is not a major issue as the shelf life of pure maple syrup is relatively long and for most households, demand outstrips supply.  If you purchase pure maple syrup in bulk containers there are a few simple guidelines that can be followed to ensure this pure natural product retains its high quality for as long as possible.

If the syrup is not opened it is best stored in a cool dark area, such as a closet or cupboard.  Stored this way we recommend the syrup be used within six months packaged in plastic and one year packaged in glass.

Once open, the maple syrup should be refrigerated.  If the container is 1L or greater it should be frozen.

We recommend that a pitcher is kept in the fridge full of syrup for day-to-day use.  The open container can then be easily stored in a deep freeze at a temperature of -18˚C.  Pure maple syrup will not freeze solid, but becomes very thick.  It will expand however, so be sure that there is sufficient room in the open container to allow for expansion.

Stored under these conditions we recommend the syrup be used within one year.  Freezing the syrup slows the natural deterioration of the flavour, colour and overall quality.

Before using their maple syrup most people prefer to heat the syrup they keep in the refrigerator before using.