What is meant by 'first growth', 'second growth' and so on?

What is meant by 'first growth', 'second growth' and so on?

There's always the question of "What's a first growth? What's a second growth? What's a fifth growth?" And it's confusing. It used to be confusing even to myself, "Well, Fifth growth? Who grew that fifth?" Whatever. There was a classification in eighteen hundred and fifty-five by Napoleon, the Primo Wine, and it was based on the very same situation. Merchandising. Who sells for the top dollar? Who, if I invited to dinner tonight, if I had Barbra Streisand here, and Warren Beatty, who would come? Everyone would come. If I went to the next tier, and said, okay, I'm going to have Charlie Sheen here, well... Nicholas Cage, well... But if I had George Clooney, oh, that would be a first growth. The second growth would be the B group, the next growth would be the C. So, first, second, third, fourth, fifth. It all had to do with a financial thing, and drawing power.