plasko20 said: I think Maurice or someone posted a link about that.
The take-away I got was that if it is unflowered (i.e. never-flowered, and I assume the only one) you have the option to register. If it has flowered and/or there are lots of fans spread around different people, you may not have the option (however, the seller may pass those rights on to you as part of the sale, but would say so explicitly).
I hope I remembered correctly.
Seedfork said: I think they get the fans so big with fertilizer in the irrigation system so every time or every other time they are watered they also get fertilized. I think they get watered every day.