Colocasia ‘Black Coral’: How to Grow This Stunning Dark-Leaved Elephant Ear Plant
If you're looking for a plant that instantly brings drama and a tropical feel to the garden, Colocasia ‘Black Coral’ is hard to beat. Its huge, glossy leaves emerge in deep purple-black shades that create a striking contrast against green foliage and colourful summer flowers.
Perfect for patios, exotic borders, large containers and jungle-style planting schemes, this spectacular elephant ear plant can become a real focal point during the warmer months.
What is Colocasia ‘Black Coral’?
Colocasia ‘Black Coral’ is a tropical foliage plant grown primarily for its enormous heart-shaped leaves. The foliage is one of the darkest of all Colocasia varieties, with rich black-purple colouring that can appear almost metallic in bright light.
As temperatures rise through summer, the plant grows rapidly, producing impressive leaves that give gardens a lush, exotic appearance.
How Big Does Colocasia ‘Black Coral’ Grow?
In favourable conditions, Colocasia ‘Black Coral’ typically reaches:
- Height: 90-120cm (3-4ft)
- Spread: 60-90cm
- Large mature leaves up to 60cm long
Its upright habit makes it ideal for adding structure and height to borders, while also performing brilliantly in large patio containers.
Where to Plant Colocasia ‘Black Coral’
For the best results, choose a sheltered location with:
- Partial shade or dappled sunlight
- Protection from strong winds
- Rich, moisture-retentive soil
- Plenty of space for the large foliage to develop
In many UK gardens, morning sun and afternoon shade provide ideal growing conditions, helping to maintain the leaves' rich dark colouring while reducing the risk of scorching during hot weather.
Soil Requirements
Like most elephant ear plants, Colocasia prefers fertile soil that retains moisture while remaining well drained.
Improve planting areas with:
- Garden compost
- Leaf mould
- Well-rotted manure
A slightly acidic to neutral soil is ideal, although the plant is generally adaptable provided it doesn't dry out completely.
Watering Colocasia ‘Black Coral’
One of the biggest secrets to success with Colocasia is moisture.
During active growth:
- Keep the soil consistently moist
- Water regularly during hot spells
- Check container-grown plants daily in summer
- Avoid allowing pots to dry out completely
Although Colocasia enjoys damp conditions, prolonged waterlogging around the crown can lead to problems, particularly during cooler weather.
Feeding for Bigger Leaves
Colocasia ‘Black Coral’ is a hungry plant and responds well to regular feeding.
For the best foliage display:
- Apply a balanced liquid feed every 2-3 weeks
- Feed container-grown plants more frequently
- Use seaweed-based feeds to encourage overall plant health
- Increase feeding during periods of strong summer growth
Regular feeding helps support the development of those spectacular oversized leaves that make this plant such a garden standout.
Winter Care in the UK
Although often sold as a perennial, Colocasia ‘Black Coral’ is not reliably hardy in most parts of the UK.
Before the first frosts arrive, you have several options:
Lift and Store
Treat the rhizomes similarly to dahlias by:
- Cutting back foliage
- Lifting the rhizomes
- Storing them in a cool, frost-free location
Grow in Containers
Many gardeners prefer to grow Colocasia in pots, making it easy to move plants:
- Into a greenhouse
- Conservatory
- Bright frost-free outbuilding
Heated Greenhouse
Plants kept above 5°C can often continue growing slowly through winter.
Best Companion Plants
The dark foliage of ‘Black Coral’ looks particularly effective when paired with contrasting colours and textures.
Try growing it alongside:
- Fatsia japonica
- Cannas
- Crocosmia
- Heuchera varieties
- Hostas
- Exotic grasses
The combination of large leaves, bold shapes and contrasting colours creates a stunning tropical-style display.
Common Problems
Yellow Leaves
Often caused by:
- Overwatering
- Poor drainage
- Cold temperatures
- Nutrient deficiencies
Drooping Foliage
Usually indicates:
- Underwatering
- Sudden temperature drops
- Wind exposure
Pests
Keep an eye out for:
- Aphids
- Spider mites
- Slugs and snails on young growth
Most issues can be controlled quickly if spotted early.
Frequently Asked Questions
Is Colocasia ‘Black Coral’ hardy in the UK?
No. It is generally considered frost tender and requires winter protection in most UK gardens.
Can I grow Colocasia ‘Black Coral’ in a pot?
Yes. It performs exceptionally well in large containers provided moisture levels are maintained.
How often should I water it?
During warm weather, check plants regularly and water whenever the compost begins to dry out.
Does it flower?
Occasionally, mature plants may produce pale yellow spathe-like flowers, although the dramatic foliage remains the main attraction.
Final Thoughts
Colocasia ‘Black Coral’ is one of the most impressive foliage plants available for UK gardeners looking to create an exotic or tropical-style display. Its huge dark leaves provide drama, contrast and architectural interest throughout summer, whether planted in borders or displayed in large containers.
With plenty of moisture, regular feeding and some winter protection, this stunning elephant ear plant can become one of the standout features of your garden year after year.
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