Forsythia intermedii spectabilis
blooms in early spring
comes 4-5′, 5-6′, feet tall
‘Spectabilis’ – grows 8-10′ feet tall and 6′ feet wide and is vigorous and bears deep yellow flowers, to 1 1/4″ across.
deciduous shrub – Easily grown in moderately fertile, moist but well drained soil in full sun or light dappled shade. Seldom flowers in warm climates.