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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.
The information on this page is based on research conducted in our nursery library and from online sources as well as from observations made of this plant as it grows in our nursery, in the nursery's garden and in other gardens that we have observed it in. We also will incorporate comments received from others and always appreciate getting feedback of any kind from those who have additional information, particularly if this information is contrary to what we have written or includes additional cultural tips that might aid others in growing Ceanothus 'Ray Hartman'.
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