I planted hostas of the year to educate. It is a simple way to quickly locate them amongs the hundreds of hostas.
I plant more according to light requirements, color, size, and the effect I want with other companion plants. I plant displays for my customers to see the plant as an adult and what other plants are good companions.
And, of course, sometimes I just need to plant it someplace until I decide what I am going to do with it. There is always the option to pot it if I am going to sell it.