Start with your evergreen wreath,make sure the mesh and ribbons are already added.

Add hot glue to the top and bottom of your stems so that it is fully covered.

Make sure your greenery or florals that you are adding are being connected to the pine and mesh. (multiple points of contact makes a more secure placement)

Make sure the stem is well placed but not coming out the other side of the wreath.

Spread the greenery out.

Make sure your glue is the consistency of honey.

Add another glue blob after you have placed it if you feel it is needed.

If you are placing a larger flower you can add glue to the back of the petals as well to make sure it's even more secure.

Make sure to part the mesh so that when you place the greenery it is hitting the mesh and the evergreen underneath.