When scarifying the seeds how do u know if u nick the embryo?

to NGA

If you nick the embryo the seeds will rot.

When I scarify small seeds (grape seeds fit my definition of small), I use my emory board. The whole idea of seed scarification is to get through the top coating of the seed. It doesn't take much - a couple rubs on the emory board will do it.

If its a large seed, use the nail clippers. Taking a little nip out of the tip will be enough.

You may find this article of interest as it comments on scarification as well:

Effects of Stratification, Germination Temperature, and Pretreatment with Gibberellic Acid and Hydrogen Peroxide on Germination of ‘Fry’ Muscadine (Vitis rotundifolia) Seed

http://hortsci.ashspublication...