“How long should you wait to dye your hair after a hair transplant?” is a common question among patients. While it is possible to dye the hair after a hair transplant, it is important to wait several weeks because newly implanted hair follicles are sensitive. Harsh dyes can interfere with their growth during the recovery. It is recommended that patients wait at least four to six months, or until the scalp has completely healed, before dying the hair.