The Garden
Name: Rough Goldenrod 'Fireworks'
Type: Solidago rugosa
Description:
A compact, cascading, clump-forming native with 2-5 foot stems that have light yellow flowers at the tips. Flowers in September. A great addition for late season color and to attract butterflies, birds, native and honey bees.  Goldenrods have been blamed for hay fever, but its irritating symptoms are actually caused by ragweed (Ambrosia species), whose pollen is airborne when the goldenrod is in flower.
Location:
 
Yellow
Sun Level: Full sun to partial shade.
Water Requirements: Moist to wet.
Height: 36 inches in.
Spread: 30 inches in.
Care:
Plants form a bushy, upright clump reaching 2 to 3 feet tall and wide of dark-green leaves and grow best in moist, well-drained soil, but are somewhat tolerant of dry and wet soils. In late summer the blooms appear along 18-inch arching stems held above the foliage to provide a stunning display of yellow flowers that resemble fireworks, hence the cultivar name.  These blooms are very attractive to various butterflies and bees. It pairs nicely with the blues and lavenders of asters or Joe Pye weed. 'Fireworks' is not aggressive and will not try to take over your garden as it spreads slowly by rhizomes. 
Propagation:
Divide every three to four years or as needed. Cut the plant down in early spring before it starts growing again.
Diseases:
No significant problems.