Zones 4-9. Although originally named as a dwarf this spirea fits the miniature criteria. Alpine Spirea has tiny leaves, rose-pink flowers in spring to early summer which occasional repeat in fall. It forms a 12-18 inch mound at about 10 years. It has a bonus of good fall color. Photo from our first garden railroad shows a 3 inch figure photographing a bear that wants to join the picnic. Shipping size: 4- 6+ inch mound.