Citharexylum spinosum aka Fiddlewood

Citharexylum spinosum typically grows as a large shrub or small tree, reaching 4 to 10 meters (12-35 feet) in height with a spread of 2.5 to 7.5 meters (8-25 feet). In optimal conditions, it can reach up to 16 meters. The species is naturally multi-stemmed but can be trained to a single trunk. Growth rate is generally slow to moderate, and the plant is long-lived and evergreen in its native tropical to subtropical range.

Citharexylum spinosum is native to the Caribbean region, southern Florida, and northern South America. Its natural range extends throughout the Bahamas, Cuba, Jamaica, Puerto Rico, the Lesser Antilles, Trinidad and Tobago, Panama, Venezuela, Guyana, Suriname, and French Guiana. The species grows naturally in dry broadleaf evergreen forests, coastal plains, and limestone hills at elevations typically below 500 meters.

Citharexylum spinosum is remarkably adaptable to various soil types including sandy, loamy, clay, and limestone soils. It tolerates a wide pH range from 5.0 to 8.0, accepting both acidic and alkaline conditions. The key requirement is good drainage, though the species can tolerate temporarily dry conditions. For best results, provide well-drained but moisture-retentive, humus-rich soil, though the plant will adapt to poorer soils once established.

Citharexylum spinosum thrives in tropical to subtropical climates with optimal summer temperatures around 27.5°C (82°F) and winter temperatures around 16°C (61°F). The species can endure wide temperature fluctuations and tolerates occasional light frosts in the northern limits of its range. It is suited for USDA hardiness zones 9b through 11, making it appropriate for frost-free or nearly frost-free areas.

Citharexylum spinosum has modest fertilizer requirements and thrives in nutrient-poor soils typical of its native habitat. For optimal growth, apply a balanced slow-release fertilizer in spring during the active growing season. Young plants benefit from light applications of fertilizer to encourage establishment, while mature specimens require minimal supplemental feeding due to their adaptability to low-nutrient conditions.

Citharexylum spinosum is readily propagated from seeds or semi-hardwood cuttings. Seeds should be collected from ripe black fruits, de-pulped, and sown fresh for best germination, which typically occurs within 13 days. Semi-hardwood cuttings root under standard propagation conditions and provide a faster method to establish new plants.

Citharexylum spinosum produces fragrant, small, trumpet-shaped white flowers arranged in elegant terminal racemes measuring 7 to 30 cm (3-12 inches) long. Each flower has five fused white petals with fine hairs at the throat and five stamens. The species flowers abundantly in spring but continues blooming year-round in tropical conditions. The sweet fragrance attracts bees, butterflies, and other pollinators.

Citharexylum spinosum is primarily pollinated by insects attracted to its fragrant white flowers. Bees are the main pollinators, with butterflies including the White Peacock also visiting the blooms for nectar. The species is dioecious, meaning individual plants are either male or female, so both sexes must be present for fruit production. Only female plants produce the characteristic orange to black berries after pollination.

Citharexylum spinosum is generally trouble-free, with few insects or diseases causing significant problems. The University of Florida notes that 'long-term health is usually not affected by pests.' The plant may occasionally experience defoliation by Fiddlewood Leafroller moth larvae (Epicorsia oedipodalis), but this is typically temporary and the plant regenerates quickly. These caterpillars actually serve as food for birds in the landscape.

Citharexylum spinosum naturally develops as a multi-stemmed shrub and requires selective pruning to maintain shape or train into a single-trunk tree form. To create a tree, continually reduce stems to one and remove lower branches until a clear trunk is established. Ongoing maintenance pruning can promote bushiness for hedge applications. Young plants coppice vigorously if cut back, though this ability decreases with age.

Citharexylum spinosum is exclusively an outdoor plant, thriving in USDA zones 9b through 11. It grows best in full sun to partial shade and tolerates moderate salt spray, making it suitable for coastal areas. The species demonstrates excellent drought tolerance once established and adapts to various soil types. Note that in Hawaii and some Pacific islands, the species is considered invasive due to its prolific fruit production and bird-dispersed seeds.

Citharexylum spinosum is prized for its fragrant white flowers that produce a sweet, pleasing scent. The fragrance is most noticeable during peak bloom in spring but continues throughout the year as the plant flowers continuously in tropical conditions. This fragrance attracts various pollinators including bees and butterflies to the garden.

The fruit of Citharexylum spinosum is technically edible, with a sweet flavor, though it is rarely consumed by humans. The small drupes ripen from orange to reddish-brown or black when mature. While not toxic, the fruits are more commonly left for wildlife, particularly birds, which relish them. The plant is harvested from the wild for local use as a food source in some Caribbean regions, but it is not considered a significant food plant.

Citharexylum spinosum has traditional medicinal applications in Caribbean folk medicine. A decoction of the bark is used to treat colds, while a decoction of young twigs treats children's thrush. In the Bahamas, it addresses gastrointestinal issues and fatigue. Historical uses include treatment of menstrual irregularities. Modern research has identified anti-inflammatory, antimicrobial, antifungal, and other biological activities in plant extracts, though these uses are not clinically validated.

The common name 'Fiddlewood' reflects the prized quality of the wood for making stringed musical instruments, particularly guitars. The heartwood is light brownish to reddish, close-grained, very hard and strong, resistant to termites and rot. It is used for furniture, general construction, windows, doors, beams, and fence posts.