CEANOTHUS. The mountain sweet or Californian lilac is a group of leaf-losing and evergreen shrubs of great decorative value. Most of them need the shelter of a Avail; a few are hardy enough to be planted in the open garden except in cold districts. The flowers of most of them are of some shade of blue. The chief favorites for the open garden are hybrids between Ceanothus americanus and Ceanothus azureus: there they grow from 2-4 feet high and flower in July-August. The best of them are Gloire de Versailles, blue, Ceres, rose, Indigo, dark blue, and Rose Perle, rose. They should be pruned in spring by shortening the shoots or branches of the previous year’s growth.
Ceanothus veitchianus is a beautiful blue - flowered shrub, in full beauty in May, for planting against a sunny wall, where it will grow 6 feet or more high. Others suitable for a sunny wall are divaricatus, papillosus, and thyrsiflorus, all having blue flowers in April - May. When the flowers are over these wall shrubs ought to be pruned by shortening the side shoots of the previous year’s growth to within a few buds of the base. They flourish in ordinary well-drained garden soil and are increased by cuttings set in a frame in July. Pron. Ce’-a-no’-thus.