Pronounciation: CORE-dee-a bo-si-SEAR-i
USDA 9 (occasionally needs protection) - 11
Landscape Use: Background, low screen, accent shrub to small multiple trunk tree, appropriate for use in both mesic and xeric landscapes.
Form & Character: Rounded and colorful. When in bloom from a distance Texas olive looks somewhat like a rounded white oleander.
Growth Habit: large woody evergreen perennial shrub, slow growth to 15 feet (height and width) in Phoenix, somewhat taller in less torrid climates.
Foliage/texture: Leaves olive green, scabrous on the adaxial side, ovate or oblong-ovate, to 5 inches long, margins entire to crenellate; medium texture.
Flowers & fruits: Flowers white with yellow centers, almost 2 inches across, in terminal clusters, fruits are ovoid (rounded) fleshy drupes, persistently covered, 1/2 inch long, green then ripening to creamy white, edible but NOT tasty.
Seasonal color: In Phoenix, Texas olive produces masses of large showy white flowers during spring with a secondary bloom period during fall after the summer monsoon.
Temperature: Hardy to 25oF. Here's some stem tip injury caused by the "Great January 17th Freeze of 2007".
Light: Full sun
Soil: Well drained, but with some ability to retain nutrients (referred to as having a good cation exchange capacity).
Watering: Infrequent deep irrigations during dry times; however, more water in the summer will hasten growth.
Pruning: Rarely, and only to shape.
Disease and pests: Texas root rot
Additional comments: Texas olive is a very classy plant with very showy white
flowers that attract butterflies and hummingbirds. It does however have a short dormant period in winter during which it
may look sparse. Its slow growth rate means one should plant larger specimens. Are Texas olive fruit edible? Some say yes, some say no, and I've never tried. In certain parts of Mexico, leaves are used as a medicinal tea to
treat rheumatism and bronchial congestion. Texas Olive was named, respectively, for Valerius Cordus, a German botanist and pharmacist of
the 16th Century and Pierre-Edmond Boissier, a 19th Century botanist. It is not related to the European olive (Olea europaea).
First introductions of this wonderful large shrub into the Phoenix area were planted as entrance sentinel specimens at the old Baker's
Nursery (now unfortunately defunct) on 40th Street north of Osborn.
First introductions of this wonderful large shrub into the Phoenix area were planted as entrance sentinel specimens at the old Baker's Nursery (now unfortunately defunct) on 40th Street north of Osborn.