Royal Palm

Roystonea regia is native to Cuba, the Cayman Islands, southern Florida, and parts of Central America (Belize, Honduras, Nicaragua).

• In Cuba, it is the dominant palm of lowland savannas and is estimated to number over 30 million individuals
• In southern Florida, native populations occur in the Everglades and the Florida Keys
• Also native to the Swan Islands of Honduras and coastal areas of Belize and Nicaragua
• Found at elevations from sea level to approximately 200 meters
• Occurs naturally in moist to wet lowland forests, savannas, and swamp margins
• Has been widely planted throughout the tropics and subtropics as an ornamental tree
• Now naturalized in many tropical regions including the Caribbean islands, Mexico, Central America, parts of South America, Hawaii, Southeast Asia, and tropical Africa
• First described scientifically by Karl Heinrich Emil Koch in 1855, initially classified as Oreodoxa regia
• Transferred to the genus Roystonea by Orator F. Cook in 1900
• The Royal Palm was so abundant in pre-Columbian Cuba that early Spanish colonists described vast savannas dotted with the palms as far as the eye could see

Roystonea regia is a large, solitary, pinnate-leaved palm with a distinctive smooth, gray trunk.

Size and habit:
• One of the tallest ornamental palms, typically reaching 15 to 25 meters, occasionally exceeding 30 meters
• Trunk is smooth, concrete-gray to whitish, 30 to 60 cm in diameter, with distinctive swollen "belly" (ventricose) in the middle
• Trunk is topped by a long, smooth, bright green crownshaft 1 to 2 meters long
• Crownshaft is formed by the tubular bases of the leaves, creating a smooth, polished appearance
• Old leaves fall cleanly from the trunk, leaving smooth, ring-like scars

Leaves:
• Pinnately compound (feather-like), 3 to 4 meters long, gracefully arching
• Leaflets are numerous, linear, 60 to 90 cm long, arranged in multiple planes along the rachis, giving the frond a full, plumose appearance
• Dark green above, slightly paler below
• Crown typically consists of 10 to 15 live fronds

Inflorescence:
• Produced below the crownshaft, large, branched panicles up to 1 meter long
• Initially enclosed in a large, green spathe that splits open to release the flowers
• Flowers are small, creamy-white, with male and female flowers on the same inflorescence

Fruit:
• Small, rounded drupes, 1 to 1.5 cm long
• Green when immature, turning purple-black to dark red when ripe
• Borne in massive hanging clusters

Roystonea regia is an ecologically important species in its native Cuba and southern Florida.

Habitat:
• Native to moist lowland savannas, swamp margins, and wet forests
• Often the dominant tree in Cuban palm savannas
• Tolerates seasonal flooding and poorly drained soils
• Grows in full sun

Ecological role:
• Fruit is a major food source for the Cuban Parrot (Amazona leucocephala) and numerous other bird species
• Palm fronds provide nesting material for many bird species
• Dead palm trunks provide habitat for cavity-nesting birds and roosting sites for bats
• The "boot" (leaf base) that persists temporarily on the trunk provides habitat for frogs, insects, and epiphytic plants
• Flowers attract bees and other insect pollinators
• Dense stands provide important habitat structure in Cuban savannas
• Fruits are eaten and dispersed by birds and bats
• In the Everglades, Royal Palms grow in distinctive "hammocks" (tree islands) in the sawgrass marsh
• Serves as a keystone species in the Cuban palm savanna ecosystem
• Highly wind-resistant due to flexible trunk structure, surviving hurricanes that destroy broadleaf trees

Planting:
• Propagation from seed, which germinates in 1 to 3 months under warm, moist conditions
• Soak seeds for 1 to 2 days before sowing
• Seedlings grow slowly for the first 1 to 2 years, then accelerate
• Plant in full sun in deep, fertile, moist but well-drained soil
• Tolerates a wide range of soil types including limestone, sand, and clay
• Hardy in USDA zones 10 to 11 — damaged by temperatures below -2°C
• Requires ample moisture during establishment; moderately drought-tolerant once established
• Tolerates seasonal flooding and poorly drained soils
• Space at least 5 to 8 meters apart for specimen plantings
• Minimal maintenance required — self-cleaning (old fronds drop naturally)
• Feed with a palm-specific fertilizer containing magnesium, manganese, and potassium
• Susceptible to lethal yellowing disease in some regions
• Ganoderma butt rot can be a problem in Florida landscapes
• Excellent for formal avenue plantings, large parks, and estate gardens
• Avoid planting near power lines — the mature height can exceed 25 meters

Uses:
• One of the world's premier ornamental palms — widely planted along boulevards, driveways, and in parks throughout the tropics
• Symbol of tropical elegance used extensively in resort and hotel landscaping
• National tree of Cuba and a symbol of the Cuban landscape
• Trunk wood is used for construction, poles, and pilings in rural Cuba and Central America
• Palm heart (the tender growing tip) is edible but harvesting it kills the tree
• Leaves are used for thatching in rural Cuba and Central America
• Fronds are used as livestock feed during dry periods
• Fruit is used as livestock feed, particularly for pigs
• The swollen base of the trunk was traditionally hollowed out to make containers and floats for fishing nets
• Oil extracted from the fruit has been used for soap and cooking
• Planted as windbreaks and living fence posts in some agricultural settings
• The palm appears on the national coat of arms of Cuba
• In traditional Cuban culture, the Royal Palm is said to represent the Cuban people's upright and unbending character