At a meeting with Russian businessman Dmitry Mazepin, who gave up control of fertiliser producer Uralchem-Uralkali after he was hit by EU sanctions in March, Putin said Russia was ready to increase its fertiliser exports.
"The main problem was probably the fact that quite a lot of fertiliser was frozen in European ports," Mazepin said at the meeting, which was shown on state TV.
There are 262,000 tonnes of Uralchem's fertiliser frozen in ports of Estonia, Latvia, Belgium and the Netherlands, he said.
Other producers, Acron and Eurochem, have 52,000 tonnes and almost 100,000 tonnes of their fertiliser stuck in Europe, respectively.
Mazepin also asked for Putin's further help with resumption of Russian ammonia exports via a pipeline running from Russia through Ukraine to the Black Sea.