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| Category: Shrub |
| Family: Rhamnaceae (Buckthorns) |
| Origin: California (U.S.A.) |
| Evergreen: Yes |
| Flower Color: Blue |
| Bloomtime: Winter/Spring |
| Synonyms: [C. 'Blue Sky'] |
| Parentage: (C. arboreus x C. thyrsiflorus var. griseus) |
| Height: 12-20 feet |
| Width: 10-20 feet |
| Exposure: Full Sun |
| Summer Dry: Yes |
| Irrigation (H2O Info): Low Water Needs |
| Winter Hardiness: 10-15° F |
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Ceanothus 'Ray Hartman' (Ray Hartman Wild Lilac) - A fast-growing, evergreen shrub or small tree that reaches 10 to 20 feet tall with an equal width. This popular cultivar has large, rounded, dark green leaves and medium blue flowers in 3 to 5 inch-long spikes that appear in late winter through early spring. Plant in full sun to light shade in most any soil, as this cultivar is surprisingly tolerant of heavy clay as well as light, sandy soil. It is thoroughly drought tolerant but accepts periodic summer irrigation. Hardy to 10 degrees F and severely damaged below 5 degrees F. Will need protection from deer that browse the soft new growth. Thrives in cool coastal gardens but also tolerates inland heat. A beautiful, reliable, and long-lived ceanothus that can perform admirably as a focal point or screen for 20 years or more, especially when pruned occasionally to enhance its overall form. A hybrid of Ceanothus arboreus and Ceanothus thyrsiflorus var. griseus that was collected near the town of Saratoga, a suburb of San Jose, and grown by Leonard Coates Nurseries, then owned by Ray Hartman and located in nearby Morgan Hill. The plant was originally introduced in the late 1940s under the name ‘Blue Sky’. In 1950 Hartman established the Saratoga Horticultural Research Foundation and in 1954 it was introduced by the foundation and renamed 'Ray Hartman' in recognition of all he had done on behalf of California’s native flora. The genus name comes from the Greek word keanthos which was used to describe a type of thistle and meaning a "thorny plant" or "spiny plant" and first used by Linnaeus in 1753 to describe New Jersey Tea, Ceanothus americanus. We have offered this great plant since 1980.
This information is based on research conducted about this plant in our nursery library and from reliable online sources. We also take into consideration observations of it in our nursery of crops, as well as of plants growing in the nursery's garden and those in other gardens we have visited. We will incorporate comments received from others and welcome getting feedback from anyone who may have additional information, particularly if it includes cultural information that would aid others in growing Ceanothus 'Ray Hartman'. |
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