vacuum sealed mason jars in a wine fridge set to 54 degrees F is my method
I 've kept dope in a jar for eighteen months and it was fine cos it remained dry. you can freeze yr stash but best if the stash is bone dry when you put it in the freezer cos if there's moisture in it, it freezes and breaks up the cell structure of yr gear. thus it crumbles upon rolling ... but is still as effective as new.
if that was a second question about hermis?: no. pollinating some parts won't prevent the rest from doing its natural thing.
if yr growing from yr own seed select them from sex-altered plants (that is: a female that has grown male parts later). after some years you will find yr male/female ratio reduces. that is: most of yr seedlings will be female. I 've been doing this to the same variety for 15 years. last year I had 100% female and my plants are getting larger over the years. largeness is ok for me because I 'm in the bush.