I know how hard it is for such a long time...that missing them. I know how you loved her. She was a sweet girl and you both gave each other a good life. I think planting the rose bush was a really neat idea. It blooms again and again. Roses are my favorites. And they remind me of the loss of my dogs, especially Lyric. They stay with you in a way, but the flower fades and goes. But then it blooms again in the spring. That represents the memories and the waxing and waning of our sadness or bitter-sweet memories. The roots and the bush are strong and hardy. Their soul never dies and they stay with us in our heart and minds.
So, you have a place to keep a rose bush and that can show you her everlasting spirit when it blooms and blooms. (((hugs)))