While some hair oils like rosemary may stimulate hair growth, the data on argan oil doing the same just isn’t present quite yet. However, this doesn’t mean it can’t contribute to overall healthy hair growth. 

Given that argan oil can protect your strands from heat, help to seal the cuticle, and hydrate a dry scalp, it is bound to encourage healthier hair. In turn, your hair may have an easier time growing when all of those other factors are functioning properly. 

In short: Argan oil doesn’t directly stimulate hair growth, but it can contribute to overall healthy hair, resulting in better growth overtime.