Mockorange (Philadelphus) a picture will soon be inserted for each cultivar below and I'll rate the fragrance in a scale of 1 to 9 (f1 to f9).

Mockorange Minnesota Snowflake Philadelphus x virginalis 6 to 8 feet tall by 5 to 6 feet wide, hardy to -30, very fragrant double white flowers, needs full sun and well drained soil (6 hours or more of sun each day).