Answered by Sayyidi Habib Umar bin Hafiz (may Allah protect him and benefit us by him)
If I am unable to recite the Wird al-Latif after Fajr, up until what time can I still recite it?
You have until the time for zuhr prayer to perform it and it would be regarded as being a current performance (ada’), but you can make it up any time after that (qada’). The time of all the adhkar of the morning begin at midnight and end at the time for zuhr prayer. The time of all the adhkar of the evening begin at the time of the zuhr prayer and last until midnight.