Tulsi often referred to as the "sacred basil" is the most sacred of the woods used in Indian worship - the only wood that is considered to be divinity itself. Likewise, the malas made of tulsi wood are considered very suitable for meditation.
Tulsi clears the aura. It helps to balance vata and kapha doshas. Saying the mantra on Tulsi increases the spiritual power of the prayer, increases devotion and spiritual growth. It protects and aids in the pursuit of Bhakti Yoga, the Yoga of devotion.