Fragrant, deciduous shrub that blooms in spring. The orange scented flowers are enjoyed by native bees, butterfllies and hummingbirds. Philadelphus lewisii is the species native to Idaho.
There are many hybrids and species of Mockorange, the size will depend on the plant you select.
This plant has a fire-resistance score of 8, meaning it should be planted 30 feet or greater from your home. Idaho Firewise: http://idahofirewise.org/
Idaho Firewise recommends these:
'Aureus'Golden leaf Mockorange (P. coronarius)
'Blizzard' Mockorange (P. hybrid)
'Buckley's Quill' Mockorange (P. hybrid)
'Snowbelle' Mockorange (P. x hybrid)
'Cheyenne' Mockorange (P. lewisii)
'Dwarf Snowflake' Mockorange (P. x virginalis)
'Manteau d'Hermine' Dward Mockorange (P. x lemoinei)
'Minnesota Snowflake' Mockorange (P. virginalis)
'Peking' Mockorange (P. pekinensis)
This plant is listed as beneficial to pollinators in the book, “100 Treasure Valley Pollinator Plants”. https://gardentronic.com/blog/one-hundred-treasure-valley-pollinator-plants/