It’s true - Transplanter's fungi are alive (although dormant in the package) and each lot of product produced bears an expiry date (you'll find that date on every package).
But it’s not quite like a banana that once you buy it you have to eat it within a week or a couple of days.
Not unlike packaged seeds, Transplanter's dormant fungi will eventually lose viability. The shelf life of Transplanter is at least 2.5 years after the packaging date.
But there are a couple of things to consider:
If the product package was never opened, the millions of fungal spores inside are viable for many, many years - in fact well beyond the expiry date.
After a package has passed its Best Before Date, it will lose about 10% of its viability per year.
So if the package passed it's Best Before day (for instance) a year ago, simply mix it 10% stronger, and it will be back to 100% viability.
BTW -
Root Rescue Transplanter does not contain any salt-based synthetic chemistry - using it at rates stronger than the standard mixing rate will never do harm to plants or the environment. Be generous with your mixing rates - your plants will appreciate it. Cheers! Bob
Recommendations for Storage:
The best storage conditions for Transplanter are: keep it dry, in the original packaging, and out of direct sunlight.
Freezing is not a problem although you don’t have to keep it in the fridge.A garage or garden shed is an ideal place to keep your Root Rescue.
However, really high heat (60 degrees C or 140 degrees F) will kill the mycorrhizae even if the package is perfectly sealed.
Humidity is also a problem because the mycorrhizae “wake up” with water, so make sure to keep everything sealed and dry in the original packaging between uses.
Sunlight: mycorrhizae evolved to live underground, so they don’t like prolonged exposure to it, that’s why the package is completely opaque.
Once you apply Root Rescue, make sure to close the package and store it in a dry place out of direct sunlight.