The talks, held on the margins of an international conference on security, were attended by Grabar-Kitarovic, Slovenian President Borut Pahor, Polish President Andrzej Duda, Bulgarian President Rosen Plevneliev, and Estonian President Thomas Henrik Ilves.
"We discussed the continuation of our cooperation in very concrete projects. I would like this initiative to be an informal platform that would result in the strengthening of authentic central Europe," Grabar-Kitarovic told Croatian reporters.
She underlined that the European Union's enlargement had consolidated Europe by connecting against its east and west, but not its north and south.
"Our initiative is also aimed at ensuring greater competitiveness for our economies," she said, adding that she was especially interested in the strengthening of the strategic position of Croatian ports and the railway and road infrastructure, in the construction of an LNG terminal and energy infrastructure "so that we become independent of energy imports and reduce the prices of gas both for the economy and for households."
The political support to the initiative is strong, "with differing degrees of the countries' readiness to participate in it," said the Croatian president.
A summit of the Adriatic-Baltic-Black Sea initiative, which encompasses 12 countries, should be held in Croatia this summer.
"We are still thinking about when to organise it, in early July or late August. We will make a decision in the coming days, in cooperation with the Foreign Ministry," said Grabar-Kitarovic.
On Saturday evening, the Croatian president will participate in a discussion held as part of the Munich security conference and focusing on Euro-Atlantic integration processes. The discussion will also be attended by the presidents of Slovenia and Macedonia and the prime ministers of Montenegro and Georgia.