You will only need to open a blocked account for the time you will be in Germany. Usually, you can open the blocked account for a period of up to 12 months.
In case you need the Blocked Account for a longer period than 12 months, you can either provide a confirmation from the authority handling your visa request or simply extend your blocked account after this period.
If you are planning to stay longer or wish to extend your Blocked Account, please send the request to firstname.lastname@example.org with a subject line -"Extending Blocked Account [UserID]". Our Expatrio Support Team will provide more information on your extension process.