This is a beautiful idea. I know owners of two different nurseries. I'm going to ask them if they've heard of it, maybe send them a link to this
thread. If not they might begin to promote the practice in the trade shows they attend.
It could also be a great idea for housewarming or a big anniversary, a 25th or something. Not everyone has stayed in the same place all their years of marriage. Maybe when people finally get their plot of earth, it would be an idea for birthday and other
gift giving occasions for a couple of years to come.
I also thought of including a $1000 gift certificate to the buyers of my house, (if and when I
sell), from a great but little known native plant nursery (owned by friends).