When finished, take it and show it to her. It just might bring her back for a few moments. I used to take plants to my DH when he was in the nursing home to identify, and sometimes his mind would snap back and he'd give me the latin name, common name and how to grow it. He was always pleased to see plants at any time. He was a nurseryman.
Maybe your Grandma will remember these. Maybe not. But it is a bit of your family's history. Be sure to put a label on it for future generations.