The Grand unveiling!

[SFCRick]

very nice looking kilt

[The F-H.C.A.G.]

Whip-stitching (like you see on the end of a wool blanket) would work. Otherwise, just leave it. Wool uniforms of the past were often left with "raw" edges, as are many of today's reproductions for reenacting. Wool fabric with a raw edge holds that edge well, and hardly frays at all....

Barb has mentioned the same thing. I suspect you don't need to do anything to get the bottom to hold.

Be well,