Just something to remember,

When dealing with anybody, trying to sell you something, remember, half their job is getting you to buy it again, and again, and again. I bought some silver thiosulfate to make my own feminized pollen. Well it worked, yay. The website said that their solution was only viable for 30 days, after mixing. Got the 2 parts in mixed them and about a month later, boom! Female pollen sacs.

So, here we are more than a year later. I find my bottle buried behind all sorts of crap for the grow, garden & yard and I remember what the website said, so do I try or do I trash? I try. And more than a year after mixing my Twenty 20 Mendocino sts, well those aren't caylx.

freezer storage means it goes for years too

Hadn't thought of that but it makes sense. There are no biologicals in it. Check him out now

yeah HE'S in grand shape keep in mind you may only need a tiny teaspoon of pollen

the rest not needed?

I just recently got a small education from another member here.
If you have the powders keep them in a dark dry location and they will store indefinitely.
Once mixed into r/o or distilled water usually good 6 months in a cool dark location,a year in the fridge.

Don’t have experience freezing because I use brown glass bottles and would be worried about the glass breaking. But good to know!

Of course they want you to keep buying. That's why I just purchased the silver nitrate and sodium thiosulfate in granular form for around $50. I can mix it with water myself and make gallons of reversal spray instead of paying $30 for enough to do one or two plants. I purchased the chemicals years ago and they are still good and I have enough to reverse dozens more plants. I just used some recently to reverse a couple plants.

Yeah, I am sure that all my STS stuff is well over 20 years old, and anytime that I need it, I just mix some up, and it still works as it should. And even the mixed up stuff, that I sometimes keep in my basement fridge has worked 2 or 3 years later!