Such a simple question - except when asked this recently, I wasn't sure.
And I can't find anything substantive in my usual reference books. All sorts of stats on plantings and the history.
It is vinifera, so I assume it is grafted.....
A definitive answer, please!
Is Tinta Negra grown on grafted rootstock?
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Re: Is Tinta Negra grown on grafted rootstock?
While I can't provide a definitive answer, I can't see how it would be own-rooted. The island is definitely prone to the louse, and being the Tinta Negra is vinifera and the vast majority of plantings , I can't think a way where I would be own rooted.
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