Tulsi Puja procedure in Tamil is dedicated to Goddess Tulsi Devi or the Tulsi plant, which is considered highly auspicious in Hindu religion. Below is the Tulsi Puja mantra and procedure in Tamil in pdf.
Link - Tulsi Puja Mantra – Procedure in Tamil pdf
Performing Tulsi puja is believed to usher in prosperity and it gets the blessing of Bhagavan Vishnu. The puja can performed on any day during the evening and also on special occasions associated with Bhagavan Vishnu, Krishna and Tulsi.
The popular belief is that married women performing Tulsi puja will help in them having a good married life. It is also performed for the wellbeing of all family members.