Germany hired banks on Monday to sell a 30-year green bond, according to memos from three lead manager seen by Reuters.

The bond will be launched "in the near future, subject to market conditions," the memos said, a phrase debt management offices often use a day before the sale.

The 30-year bond will extend Germany's green yield curve, following the issuance of a 10-year green bond last September and a five-year green bond in November.

Unlike other European governments that have focused on a single maturity for green issuance, Germany is building a yield curve of green bonds, which fund environmentally beneficial projects.

The bond, due August 15 2050, will be twinned with Germany's outstanding conventional bond with the same maturity.

Germany hired BofA, BNP Paribas, Citi, Commerzbank, DZ Bank and HSBC for the sale, the memos said.

(Reporting by Yoruk Bahceli; editing by Dhara Ranasinghe) ((Yoruk.Bahceli@thomsonreuters.com; +44 20 7542 7571; Reuters Messaging: yoruk.bahceli@thomsonreuters.com))