Don't crop; you've done that part already and will only kill the dynamic.
What I'd do, were it mine, is darken the top of the frame with a feathered grade, something that was oh so simple and visceral with wet print. I'd probably try the same darkening at the base, too, though this might just be the influence of Van Morrison on the system as I write... what can you lose? You might like it. But don't fix what ain't broke: the framings good, and I think you gain something by not having the weeds spread evenly across all of the frame. Life is seldom a reflection, left of right.