There weren't friars in Elizabethan England because of the dissolution of the monasteries, friars were either made homeless or fled abroad. In other countries where they still had monasteries they would have worn plain robes or hair shirts depending on what order they belonged to.
It depends what production you are talking about. In each production, he wears a different costume. And that is perfectly all right.
Romeo asks friar Laurence to marry him and Juliet in secret
Friar Laurence is Romeo's confidant, and the play suggests Romeo has known him since he was very young as it implies that the Friar is a religious leader. Friar Laurence is to Romeo; what the nurse is to Juliet.
friar Laurence
He sends Friar John as a messenger.
Friar Laurence says young men's love resides not only in their hearts, but in their eyes.
Friar Laurence was created in 1597.
Romeo asks friar Laurence to marry him and Juliet in secret
Friar Laurence belongs to the Franciscan religious order.
Friar Laurence is Romeo's confidant, and the play suggests Romeo has known him since he was very young as it implies that the Friar is a religious leader. Friar Laurence is to Romeo; what the nurse is to Juliet.
Friar Laurence asks Friar John to deliver a letter to Romeo explaining the plan to fake Juliet's death.
friar Laurence
he is a friar but he also likes to garden
Juliet asks the Nurse to listen to her confession instead of Friar Laurence.
Friar Lawrence was a clergyman and Romeo's confessor.
He sends Friar John as a messenger.
Friar Laurence's specialty is the use of medicinal herbs and plants. He is known for his knowledge of natural remedies and his abilities as an apothecary.
Friar Laurence confesses to Friar John at the end of Romeo and Juliet. He reveals the truth about his role in the tragic events that led to the deaths of Romeo and Juliet.