Scotch Broom
(Cytisus scoparius)

The name comes from an old-time custom of using this plant to make brooms for sweeping floors. Scotch broom is a fast-growing, 4- to 6-foot shrub with upright  or  trailing  bright  green branches and masses of bright yellow, pealike flowers in mid-spring. 

Soil: Prefers acidic, dry soil that is not too fertile.
Light: Full sun
Zone: 6

Comments
Broom is an excellent addition to the formal garden or naturalized setting. It also adds interest to winter landscapes because the branches retain their bright green color all year. To keep plants compact, prune after flowering. Brooms are hard to transplant, so choose sites carefully to avoid having to move them later.