Scarifying Jujube Seeds

Hi to all,

Jujube seeds are really hard, I was gifted some and I want to free them of their seed coat and stratify them this Winter. Any ideas short of taking an angle grinder to them? Vinegar? A hammer? Gosh they're hard. No I dont have a flexible shaft/dremel type tool available. A nut cracker maybe? I have a 25 lb shop vise...maybe that would work?

Any ideas most appreciated. Mike

just sandpaper or equivalent should work.

I use wire cutters and cut at one end until I get the seeds out.