Canary Island date palm

Phoenix canariensis

1. Identification and origin

The Canary Island date palm (Phoenix canariensis Chabaud) is an arboreal species of the Arecaceae family, endemic to the Canary Islands. It has been widely spread as an ornamental species in regions with a Mediterranean and subtropical climate, including mainland Portugal, where it is common in gardens, public spaces and urban alignments.

2. Economic importance

The species has high ornamental importance due to its majestic size, relative resistance to drought and adaptation to various types of soil. It is used in urban landscaping, tourism and the aesthetic enhancement of outdoor spaces. Its economic relevance has been conditioned by the spread of the palm weevil, which has increased maintenance and plant protection costs.

3. Botanical characterisation

A large monocotyledonous tree, which can reach 15–20 m in height. The stipe is single, robust, covered with the remains of leaf bases. The leaves are pinnate, arched, 4–6 m in length, forming a dense crown. The inflorescences are large panicles protected by spathes, with unisexual flowers. The fruit is an ovoid drupe, orange to brown in colour when ripe. The species shows slow to moderate growth.

4. Soil and climate requirements

The Canary Island date palm adapts well to Mediterranean climates, tolerating hot, dry summers and mild winters. It prefers well-drained soils, with a loamy to sandy-loam texture and a pH between 6.0 and 7.5. It tolerates some salinity and sea winds. It is sensitive to prolonged waterlogging and to severe frosts, especially in young stages.

5. Main pests

• Palm weevil (Rhynchophorus ferrugineus): internal boring, destruction of the apical meristem and death of the plant
• Palm borer moth (Paysandisia archon): galleries in the stipe and leaves, weakening the plant
• Scale insects (Diaspididae and Coccidae): sap sucking and associated sooty mould
• Mites (Tetranychidae): chloroses and reduced vitality
• Nematodes (Meloidogyninae): root damage in infested soils

6. Main diseases

• Stipe and root rots (Fusarium oxysporum f. sp. canariensis): wilting and sudden death
• Basal rots (Phytophthora spp.): necroses and progressive decline
• Leaf spots (Alternaria spp., Graphiola phoenicis): leaf lesions and reduction of the photosynthetic area
• Physiological declines associated with water or saline stress

7. General crop management

The management of the Canary Island date palm includes the rigorous monitoring of quarantine pests, especially Rhynchophorus ferrugineus and Paysandisia archon. Pruning should be minimal and carried out only when strictly necessary, avoiding extensive wounds that favour the entry of pests and pathogenic organisms. Watering should be moderate, ensuring good drainage. Fertilisation should be balanced, with attention to magnesium and potassium. In risk areas, the implementation of preventive monitoring and plant protection treatment programmes is recommended.

Bibliographic references

• EPPO Global Database – Phoenix spp.
• CABI – Crop Protection Compendium – Phoenix canariensis
• Broschat, T. K. (2019). Palm Nutrition and Fertilization. University of Florida IFAS Extension.
• D’Hont, A., et al. (2020). Diseases and Pests of Palms. Springer.
• Howard, F. W., et al. (2001). Insects on Palms. CABI Publishing.
• FAO (2022). Guidelines for the Management of Red Palm Weevil.