In an effort to keep deer, and grass out of a food forest I decided to plant rhubarb plants about every 2-3 feet (tight spacings) around the perimeter of the forest so that going through the area is prohibited before "picking your path". What do other designers think of the idea?
I plan to market the rhubarb with the local roadside stand that the neighbor runs.
You can eat anything once, sometimes more than once.
I didn't have much luck planting rhubarb into grass, so you might have to mulch it well to get it established. I'm trying something similar with comfrey around some of my growing areas, against grass rather than deer though.
Rhubarb (Rheum rhabarbarum) is one of the plants; deer do not like to eat due to its high levels of oxalic acid. It is equally possible its pungent smells, and textured leaves are also other reasons while deer tend to stay away from them.
However, they go on to say deer will eat it if they are hungry enough, and of course there will be no barrier in winter when the plants are dormant. I think it could be an interesting experiment and makes me want to plant more rhubarb myself!
It might work for grass, but I think deer will go right through/over it. I'm two hours north of you and deer on my land prefer not to go through wild blackberry bramble. They'll sometimes do it when startled, but I bet it cuts them up pretty good. Other than that, deer go wherever they please here.