If Rahu (North Node) is giving negative energies and vibrations, badly placed and not favouring the individual and delivering ill effects, then the individual is advised to wear this root of Chandan also known as Sandalwood or Santalum album.
After getting root of Chandan purify it with Ganga Jal and during night of Saturday offer puja with dhoop, deep and flowers while chanting Rahu Mantra. Wrap it with white cloth or thread and tie it to right arm.
Alternatively, you can also do the above puja during any of the Rahu Constellations/ Nakshatras – Aadra, Swati and Shatbhisha.
Mantra: “Aum Bhraam Bhreem Bhroum Sah Rahuve Namah”
Alternatively you can also use root of “Nagarmotha” also known as Nut Grass Root for Rahu