How Often To Get A Haircut if You're Trying to Grow Out Your Hair Want extra long hair? Toth recommends only visiting your hairstylist twice a year. "Don't colour your hair and deep condition it once a week," Toth said. "[While] you're actually supposed to get it cut more often, if your stylist is even a tiny bit scissor-happy then this plan won't work out." Image Source: Getty / kokouu