Plant Patent ®
If you see a ® behind a Hosta name it means that the Hosta is patented or there is a perennial patent applied for.
This could be for Holland, Europe, U.S. or worldwide and it is advisable for professionals to be aware of this before deciding to grow and sell these Hostas as propagation is prohibited for all patented and patent-pending Hostas without a licence from the owner of the plant patent.