K.W.
Plant a tree in grandma's memory. Every year as it continues to grow, you will be reminded of her. One that flowers would be a nice idea. I have gone to doing that when someone passes away rather than sending flowers. It's something that keeps on living. I don't remember the website I used, but here is one to start. http://www.thecomfortcompany.net/memorial-sympathy-gift-t... Sorry for your loss...