Ian Neale has a green thumb.

A massive, green thumb. He has a penchant for growing gigantic vegetables. So when hip hop artist snoop Dogg heard of Mr. Neale's horticultural accomplishments, he was impressed.  Mr. Dogg, himself an avid grower -- albeit of crops of a different kind -- invited the 68-year-old Welsh gardener to his concert. We spoke to Mr. Neale to get his reaction to such an invitation from a fellow grower.