Washington, D.C.—Penton Media on Thursday acquired the annual trade show Natural MarketPlace from the Natural Products Association. Financial terms of the deal were not disclosed. Penton’s New Hope Natural Media Group will manage the show in partnership with the association, beginning in 2009. This year’s edition of Natural MarketPlace takes place July 17-19 in Las Vegas. The show attracts retailers, suppliers and manufacturers working in the natural products industry.