The plants in the plant-specific databases are just as accessible as any others when you search for them. You're probably typing too much in the search box. In the latest case I remember of your proposed new plant being in the database already, you added lots of species information, including the cross used for the hybrid. If you had searched for just the genus and cultivar name (euphorbia pick me pink) , you would have found the entry.
http://garden.org/plants/searc...
