I missed the poll but I'll vote here, I'd go with the.... Hold on one second while I go back and read the OP ....
OK, I'm glad I did because I missed the garden part. Now with that said I'd use the smooth bone and the best reason I can give is to show an example of why.
This one was right after it was finished, wish I woulda took before pics.
This 100 year old Graeff & Schmidt has all those years of patina and rubbed so smooth, so pocket worn it's just a measure to hold. I find myself drawn to it in my pocket like a worry stone and whenever I seemed to need a knife my hand was already on it worryin' it. Didn't have to fish it out or dig for it it was in my hand already.

Now I've only had this for about 15 years and it's only looked like this in the last 4 years or so.
When I originally found it covered in latex paint, it was a eggshell colored blob and it sat for 10-11 years in my basement before I decided to do something with it. I couldn't even open it and almost tossed it deeming it irreparable but something possessed me to peel the paint off and see what was underneath. I didn't even know what the scales were made of and after a little cleaning I saw the smooth bone and the color/patina it had, how rich and deep the color went after 100 years.
Let's just say it was in rough shape with chips taken outta the main blade where the previous owner had used it to open paint cans and obviously mix paint with it before he threw it into a toolbox and sit till I found it while clearing buildings for demolition. The short of it was I cleaned it and re profiled the main blade and after all the cleanin' and oilin' and workin' back and forth the pivots this was the result.
After 4 years of on and off pocket carry this was the additional patina to the smooth bone scales. It'll take a hundred years to get there but think of the stories to be told and the secrets it'll hold after 100 years. That's how heirlooms start right? Anyway, that was my vote and my TL

R answer
Readers Digest Condensed version...
Smooth bone because after a long time it'll developed a rich patina and character like mine. Oh and to play the devil's advocate here, there's something to be said for carryin' around a knife known as a pick bone Pick Lick. That's definitely a conversation starter
