Make sure they are hermetically sealed. Nothing gets in, nothing gets
out. Don't take them out till ready to use. Don't refreeze. I think
a better solution than hot humidity storage over the long haul. Make
sure freezer is frost free. I would also use additional freezer wrap
to make sure. Blanched vegetables hold up forever in a freezer. You
can consider green teas in particular as blanched. Freezing versus
zero is just a function of utility bills.

Jim

Gyorgy Sajo wrote:
Greetings,

Every spring time I order a couple of hundred grams of different fresh green
teas from China. They arrive in 50g sealed silver foil bags which I keep in
the freezer for several months, sometimes for up to one year. This way I
only have a small amount of tea opened and I believe - but might be wrong -
that the unopened bags keep the scent and the flavour of the tea virtually
as fresh as they were when I received them. BTW I keep the opened bags in
the freezer, too.

Are there any arguments against this way of storing tea? Might be that
temperatures below freezing point, as well as regularly taking out and
putting back the already opened bags, even only for a few minutes, can harm
the tea in any ways? - Generally, what are the opinions about keeping tea in
the freezer?

Thank you for any input,
Gyorgy