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Growing Inspiration
Inspiration for future Agardeni growing environments.
ornamentalFamily: AraceaeGenus: Colocasia-royalhawaiianSpecies: esculenta
Cultivar
Diamond Head Elephant Ear
Colocasia-royalhawaiian esculenta 'Diamond Head'
Cultivar: Diamond Head
Colocasia 'Diamond Head' is a standout selection from the Royal Hawaiian series, prized for its dark, nearly black foliage with a brilliant sheen. Its thick, rounded leaves hold their deep color throughout the growing season, creating a bold aesthetic that contrasts beautifully with lighter-colored plants. This cultivar maintains a relatively compact and upright habit, making it perfect for container displays or protected landscape beds.
Diamond Head is a striking tropical elephant ear featuring dramatic, deep purple-black glossy foliage that adds intense color to the garden. It is a stunning, compact choice for containers or as a focal point in moist landscape borders.
Marketplace packs coming soon
Current nursery inventory and 18 / 36 / 72 pricing will appear here when available.
Cultivar Story
Start with Inspiration. Grow Your Aspiration.
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Marketplace Plant
A realistic representation of the starter plants offered in 18, 36, and 72 plant quantities.
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Aspirational Garden
Grow your aspirational plan into an inspirational garden.
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Plant Detail
A closer look at the fruit, flower, foliage, or mature defining characteristics of this cultivar.
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Repotting / Start Growing
Begin with a starter plant and establish it in a larger pot using quality potting soil with beneficials and fertilizer.
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Start · Plan · Grow
Start with real plants. Plan with current marketplace availability. Grow your aspirational garden.
Cultivar Video
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Cultivar Video Coming Soon
See this cultivar from starter plant to aspirational garden.
Plant Profile
Grow Diamond Head Elephant Ear with confidence
Key growing information first, with the complete reviewed cultivar profile available when you want it.
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Sun
Partial shade to full sun; morning sun with afternoon shade is ideal in hot regions.
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Water
Keep consistently moist; this plant thrives in high-moisture environments and can tolerate boggy, poorly drained soils.
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Mature size
3-4 feet tall and wide.
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Hardiness
Zones 8-11, commonly grown as an annual in cooler climates.
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Growth habit
Clumping perennial with an upright habit.
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Plant type
tropical foliage plant
View Plant Data
Care, size, flowering, climate, soil, health, and additional reviewed data.
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View Plant Data
Care, size, flowering, climate, soil, health, and additional reviewed data.
Good to know
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Growing note
For the best leaf color, provide consistent moisture and protect from harsh midday sun in very hot climates to prevent leaf burn.
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Climate note
Thrives in heat and high humidity; protect from frost and temperatures below 40 degrees Fahrenheit.
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Flower / fruit
Rarely flowers in typical garden settings; grown primarily for its foliage.
Growing & Care
Everyday care, growth, feeding, and pruning guidance.
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Growing & Care
Everyday care, growth, feeding, and pruning guidance.
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Sun / light
Partial shade to full sun; morning sun with afternoon shade is ideal in hot regions.
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Growth rate
Moderate to fast during warm growing seasons.
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Fertilizer
Use a balanced, slow-release fertilizer during the active growing season to support lush leaf production.
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Pruning
Remove older, yellowing, or damaged leaves at the base to maintain a clean appearance.
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Care notes
For the best leaf color, provide consistent moisture and protect from harsh midday sun in very hot climates to prevent leaf burn.
Size & Habit
How the plant grows and the space it needs at maturity.
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Size & Habit
How the plant grows and the space it needs at maturity.
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Mature size
3-4 feet tall and wide.
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Growth habit
Clumping perennial with an upright habit.
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Spacing
3-4 feet apart.
Flower / Fruit
Flowering, fruiting, pollination, bloom, and harvest behavior.
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Flower / Fruit
Flowering, fruiting, pollination, bloom, and harvest behavior.
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Flowering / fruiting
Rarely flowers in typical garden settings; grown primarily for its foliage.
Climate & Hardiness
Cold, heat, chill, and regional growing considerations.
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Climate & Hardiness
Cold, heat, chill, and regional growing considerations.
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Hardiness zones
Zones 8-11, commonly grown as an annual in cooler climates.
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Temperature
Thrives in heat and high humidity; protect from frost and temperatures below 40 degrees Fahrenheit.
Soil & Water
Moisture, drainage, soil, and pH preferences.
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Soil & Water
Moisture, drainage, soil, and pH preferences.
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Watering
Keep consistently moist; this plant thrives in high-moisture environments and can tolerate boggy, poorly drained soils.
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Soil
Rich, fertile, organic, well-draining potting mix or loamy garden soil.
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Soil pH
5.5 - 6.5
More Plant Data
19 additional reviewed fields from this Plant.id.
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More Plant Data
19 additional reviewed fields from this Plant.id.
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Container Growing
Excellent for containers; ensure the pot has adequate moisture retention capabilities to prevent wilting.
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Family
Araceae
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Foliage Look
Dark purple-black, glossy, heart-shaped, large, tropical, waxy texture.
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Foliage Rules
Leaves must be deep purple to black with a distinct glossy sheen; heart-shaped with prominent veins.
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Fruit Flower Look
Not applicable for this ornamental cultivar.
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Fruit Flower Rules
Flower production is not a characteristic feature for this ornamental foliage plant.
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Growth Habit Rules
Maintain the upright, clumping nature; do not depict as a vining or sprawling plant.
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Mature Plant Look
An upright, bold, and dark-foliaged tropical clumping plant with a dramatic presence.
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Mature Stage Morphology
Clumping habit with large, glossy, dark purple-black, heart-shaped leaves held on sturdy, upright stems.
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Morphology Rules
Emphasize the upright, dark-foliaged architecture and the glossy surface of the leaves.
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Plant Faqs
How much sun does Diamond Head need? It thrives in partial shade or morning sun with afternoon protection. Is this plant safe for containers? Yes, it is an excellent choice for large containers when given plenty of water. How tall does this plant grow? It reaches a mature size of about 3 to 4 feet in height and width. Does it need a lot of water? Yes, it prefers consistently moist, rich soil to look its best.
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Root Look
Healthy, white to tan fibrous root system within the plug.
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Soil Look
Dark, rich, moist, organic, professional potting media.
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Starter Stage
Appears as a small, green or dusky-purple plug with developing, heart-shaped leaves.
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Starter Stage Morphology
Small, tender leaves beginning to show the characteristic dark color; root system should be robust and healthy.
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Video Voiceover Script
Welcome to Agardeni, where inspiration for gardening helps us imagine how and where we will grow Diamond Head Elephant Ear. This is Diamond Head Elephant Ear, available as 18, 36, and 72 plant starter trays through the Agardeni Marketplace. Let this vibrant tropical plant become part of your aspirational plan, helping you imagine the future lush landscape you want to create. Observe the striking, glossy, dark purple-black foliage that gives this elephant ear its bold and modern appearance in any setting. Establish your starter by repotting it into a four-inch pot with a quality, well-draining mix, then move it to its final container or garden location when it is ready. Find your inspiration with Agardeni. Explore real plants and real availability. Start. Plan. Grow.
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Youtube Tags
Colocasia Diamond Head Elephant Ear Tropical Foliage Agardeni Dark Foliage Plants Container Gardening Tropical Garden Perennial Royal Hawaiian Colocasia Plant Care
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Youtube Video Summary
Discover the stunning dark beauty of Colocasia 'Diamond Head', a compact elephant ear known for its glossy, deep purple-black foliage. This tropical powerhouse is a perfect addition for those looking to add bold, modern contrast to their container gardens or damp landscapes.
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Youtube Video Title
Colocasia 'Diamond Head' | Dramatic Dark Foliage Elephant Ear
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Future Buyer Brand Sellers
Possible future seller options for 2.5-inch, 4-inch, and 1-gallon finished plants.