There are about 20 species of deciduous shrubs and trees, which are grown for their arching panicles of small, very fragrant blooms. They will bloom from mid-spring in shades of pale yellow, white, pinks, and purples. The leaves are grown in an opposite form. They are fully hardy and will need full sun with deep fertile, well drained, preferably alkaline soil. You can propagate by softwood cuttings in the summer.
Microclimate
Sun
Shelter
Aspect
Hardiness
Drainage
Semi-moist conditions
Soil Type
Deep, fertile, well drained, preferably alkaline, chalky clay soil.