Answers

Command hooks  won't damage an exterior door or leave behind a residue when removed. 

You can put a small tack on the top of the door and hang a piece of fishing line down from that to attach the wreath to. Make sure the tack does not stick up high enough to hit the top jamb of the door. We use this method to hang wreaths on the front doors of our model homes. It does not leave any kind of mark when we remove the wreath. 

We are fond of hanging wreaths on front doors with over the door wreath hangers. This will prevent damage to your front door. Happy Holidays!

It would be in the best interest of maintaining the quality of the material to use an over the door wreath hanger. Happy Holidays 

We would suggest that in order not to damage a door, that you use an over the door hanger. An even bigger suggestion with an over the door hanger is adding a self adhesive felt dot to the back where it touches the door so if the hanger shifts it doesn't rub the paint off of your door. A hanger tends to be more weight tolerant and can be easily removed.

Another option is a commend hook, but you do risk it not holding and even though they claim to come off clean it can peel paint.