This is one of the most common questions raised by users. While patchouli oil for hair works very well in reviving the health and growth of your hair, it is more effective when used alongside other natural ingredients and herbs. These are particularly useful in treating baldness, graying, dryness, and dandruff. However, it may be too strong or not suitable for some sensitive skin types or scalp conditions. In that case, you may need to consult a doctor before using or finding an alternative treatment method.