The key to increasing growth with NJoy's Long & Healthy Hair Growth Oil is stimulating the follicles to grow hair.  The more consistently you stimulate the follicles, the more consistently you get growth.  That said, NJoy's hair growth oil can be applied daily for regular stimulation.  And even though daily applications are not required, it is recommended that NJoy's Long & Healthy Hair Growth Oil is applied at least 3 times a week. This is basically every other day.

If NJoy's growth oil is applied in this manner, then it is suggested that the scalp is also massaged on the day that the oil is not applied so that the remnant oil is reinvigorated and produces a stimulating effect.  So in essence, you are still stimulating the follicles for growth on a daily basis.  And the more consistently you stimulate the follicles, the more consistently you get growth.