Is it possible to sow edamame/soy beans from blanched frozen ones in store bought bags?

My guess would be no.

Blanching indicates that they have been briefly boiled (100*C/212*F).
That would, most likely destroy their viability.
Immediately being flash frozen after that, would most likely cause further harm.

But, what do you have to lose by trying?  A few seeds.

Once blanched, those seeds are dead.  Then freezing them on top of that abuse double kills them.

Just enjoy them.

If you have a food coop near you, they probably sell bulk dry soybeans. I'd bet $5 those are both more likely to sprout and cheaper. Plant some, pick 'em before they're ripe, and boil them up with salt (I especially like the northern Chinese approach of adding some star anise to the boil).

bulk dry soybeans?
I'll keep a look out for those. Thanks for that tip - i'm not used to dried beans and similar stuff.

Benny Jeremiah wrote:bulk dry soybeans?
I'll keep a look out for those. Thanks for that tip - i'm not used to dried beans and similar stuff.

For garden quantities of things they sell, the bulk section at the coop is always the cheapest way to get seeds. Some people soak 'em first but I usually just toss and cover or dig little holes with my gardening knife and drop them in dry. It works.