We can certainly do that, but we'll need information to make it happen.
If the ADS could give us a spreadsheet or something that contains for each cultivar, the cultivar name as well as the link to the plant in their database, I can put those links into the database. The added benefit would also be that I can then add whatever cultivars are currently missing from our database.
This would be a win-win because they get links to their site and extra visitors from those links, and we get more up to date list of cultivars.