Took these pics today. The rose is looking it's healthiest since I've had it. Poor thing has had a tough time. I originally had it in the ground, but a vole kept chewing on it's roots, so I moved it to the cedar planter. I'm not sure if it's health is due to the fact that I started fertilizing it after I recently found out that potting soil has no nutrients in it, or because of the onion. Onion is doing good too. Compare the rose with a picture I took about 7 weeks ago.
Rose & companion Ornamental Onion 7-29-16
Backside
Onion looks like it could be split again, but I'm going to leave it for now.
Rose 6-8-16