I must still be whacked out from the time change. I had to read your
post twice because I thought you were advocating using starving
college students to edge a bed, literally.

(I've known a few who, study-habits-wise, were about on par with
stones or treated lumber.)

Thanks for the unintentional laugh.

M. Reed

In that case, your primary problem would be fungal rot. The wetter the
soil, the faster the rot. Of course, some types of wood rots faster
than others. Why not just use stone? Heavy, but permanent.
In case that's too physically challenging, starving college students
are pretty cheap. Maybe you could even trade labor for future produce.

Bill