Tulasi plant is considered sacred to Vishnu and is said to have been produced at the churning of the milk-ocean. Comments: The Sikh Gurus considered the worship of Salagrama as idol-worship, therefore they rejected it. They laid stress on the worship of the Omnipresent Lord and also laid emphasis on good actions. See : Salagrama.
References :
1. Kohli,Surindar Singh ed,Dictionary of Mythological References in Guru Granth Sahib 1993