You can use onion beard oil at any time of the day, in the morning, or at night before your bedtime. It is important to opt for a toxin-free beard oil that offers maximum results without turning your beard white. We thus recommend using Mamaearth Onion Beard Growth Oil after a shower before bedtime. Generously apply it on your face and beard and let it stay overnight to work. You may wash it off the next day.