Arugula does not taste peppery to me. It is the most vile disgusting taste that I have ever had in my mouth. I couldn't spit it out fast enough. I almost had to wash my mouth out with soap to get rid of the vile disgusting taste.Arugula on a sandwich, instead of lettuce gives the sandwich a little peppery tang
If you like it, good for you.

but if you only have a half an acre, something else might be better suited. What did you want them for? Milk ?