I'm sorry to hear it, I'm always upset when any of my plants die. My first basil plant died last week, I grew them from seeds.
I like growing eremophila plants though, they're beautiful, sadly, my Eremophila glabra died around two months ago, I grew that plant from a 3cm seedling into a metre high plant and then it just... dies.
Though Umbrella trees aren't really good to have in a garden. The roots can tear a house's driveway/plumbing to pieces.