"After a court decision, we found ourselves in a difficult situation and it is important for us at present to strengthen our organization, rather than dwell on things past," Rogozin told a news conference in Moscow.
He said the party would start actively recruiting new members to gain more political clout.
"We have 140,000 members throughout Russia, but this is not enough because we are lacking an administrative resource," Rogozin said. "We can oppose the majority party only with numbers."
He revealed Rodina plans to start a national project dedicated to solving the demographic crisis in Russia, migration and repatriation issues.
Rogozin also said the party would form a committee to protect Rodina's rights. It will be a public organization formed from independent prominent figures, including members of the Russian parliament.
Rodina (Motherland) had been banned from participating in the elections after the ultra-nationalist Liberal Democratic Party of Russia (LDPR) filed a suit against the party with the Moscow city court claiming a Rodina television commercial incited inter-ethnic tension.
The commercial featured three dark-skinned men from the Caucasus tossing a watermelon rind at the feet of a passing Slavic girl with a baby. A voice-over against the background of the Rodina emblem urged people to "remove the rubbish from Moscow."
