Overview & Description

The Spike Broom (Cytisus nigricans ‘Cyni’) is a dense, compact, upright deciduous shrub prized for its striking vertical spikes of golden yellow, pea-shaped flowers that bloom in spring to early summer, creating a vibrant display. Its light green, small leaflets provide a fine-textured backdrop and turn attractive shades of yellow in autumn, adding seasonal interest. This very hardy shrub is well-suited for sunny, well-drained locations.

Growth & Size

This variety exhibits a dense, compact, upright growth habit. It is a moderate-growing shrub, typically reaching a mature size of about 4 feet in height with a spread of up to 40 inches.

Additional Notes

It blooms in spring to early summer. Exceptionally hardy to Zone 3, it is drought-tolerant once established and thrives in full sun with well-drained soil. All parts may cause upset stomach if ingested. An outstanding choice for borders, mass plantings, rock gardens, and xeriscapes where upright form, vibrant yellow blooms, and reliable performance are desired.