Alocasia scalprum
Alocasia scalprum
Alocasia scalprum, also known as the scalprum elephant ear, is a striking tropical plant known for its unique leaf shape and lush foliage. Native to Southeast Asia, it adds a touch of exotic beauty to any indoor space, making it a favorite among plant enthusiasts.
Everything it needs
9 essentials at a glance
Watering
Alocasia scalprum prefers consistently moist soil, so water when the top inch of the soil feels dry.
During the growing season (spring and summer), water every 1-2 weeks, allowing excess water to drain. In fall and winter, reduce watering to every 2-3 weeks as the plant's growth slows. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause leaf droop and crispy edges.
Light
This plant thrives in bright, indirect light but can tolerate partial shade.
Ideal placement is near a window with filtered sunlight for about 6-8 hours a day. Avoid direct sunlight, which can scorch the leaves, and ensure it has some protection from low light conditions.
Soil
Alocasia scalprum prefers a well-draining potting mix that retains some moisture.
A mix of peat, perlite, and orchid bark with a pH range of 5.5 to 6.5 is ideal. Ensure the pot has drainage holes to prevent waterlogging, which can lead to root rot.
Humidity
This plant enjoys high humidity levels, ideally between 60-80%.
To increase humidity, consider using a humidifier, placing a pebble tray with water beneath the pot, or grouping it with other plants. Signs of humidity stress include browning leaf tips and wilting.
Temperature
Alocasia scalprum thrives in temperatures between 65-80°F (18-27°C).
It is best suited for USDA hardiness zones 10-12. Protect it from temperatures below 50°F (10°C) as it is sensitive to cold drafts and frost.
Fertilizing
Use a balanced liquid fertilizer with an NPK ratio of 20-20-20 every 4-6 weeks during the growing season.
In fall and winter, reduce fertilization as the plant's growth slows. Signs of nutrient deficiency include yellowing leaves and stunted growth.
Pruning
Prune Alocasia scalprum in spring to remove any dead or yellowing leaves and to shape the plant.
Use clean, sharp scissors or pruning shears to avoid damaging the plant. Deadheading is not necessary as this plant is primarily grown for its foliage.
Repotting
Repot every 1-2 years or when the roots outgrow the pot, typically in spring.
Choose a pot that is 1-2 inches larger in diameter. Signs it needs repotting include roots growing out of the drainage holes or water not absorbing properly. To repot, gently remove the plant, refresh the soil, and place it in the new pot.
Propagation
Propagation can be done through division or offsets.
The best time to propagate is in spring. Carefully remove the plant from its pot, separate the offsets with roots attached, and replant them in their own pots. Keep the new plants in a warm, humid environment until they establish.
When it's unhappy
Yellow leaves
Why it happens
Over-watering or insufficient light.
How to fix it
Check the soil moisture and adjust watering schedule, and ensure the plant receives adequate indirect light.
Brown leaf tips
Why it happens
Low humidity or underwatering.
How to fix it
Increase humidity around the plant and ensure consistent watering.
Root rot
Why it happens
Excessive moisture and poor drainage.
How to fix it
Remove the plant from the pot, trim away any rotten roots, and repot in fresh, well-draining soil.
Pests (e.g., spider mites, aphids)
Why it happens
Dry conditions or stress.
How to fix it
Inspect the plant regularly, and treat infestations with insecticidal soap or neem oil.
Leaf drop
Why it happens
Sudden temperature changes or stress.
How to fix it
Maintain stable temperatures and avoid placing the plant in drafty areas.
Care through the year
Spring
In spring, increase watering as the plant begins to actively grow. Fertilize every 4-6 weeks and check for signs of pests.
Summer
During summer, maintain consistent moisture and high humidity. Ensure the plant receives bright, indirect light and monitor for pests.
Fall
In fall, gradually reduce watering as growth slows. Continue to fertilize until late fall, and prepare the plant for lower light conditions.
Winter
In winter, water less frequently and keep the plant in a warm location away from drafts. Avoid fertilizing during this dormant period.
Toxicity & Safety
Alocasia scalprum is toxic to pets and humans if ingested. The plant contains calcium oxalate crystals, which can cause irritation, swelling, and pain in the mouth and throat. Symptoms of ingestion include difficulty swallowing, drooling, and gastrointestinal distress.
Good to know
Why are my Alocasia scalprum leaves turning yellow?
Yellowing leaves can indicate over-watering or insufficient light. Check the soil moisture and ensure the plant is receiving adequate indirect sunlight.
How often should I water my Alocasia scalprum?
Water your Alocasia scalprum when the top inch of soil feels dry, typically every 1-2 weeks during the growing season and every 2-3 weeks in winter.
What humidity level is best for Alocasia scalprum?
Alocasia scalprum thrives in high humidity levels between 60-80%. Consider using a humidifier or a pebble tray to maintain humidity.
How do I propagate Alocasia scalprum?
Propagation can be done through division in spring. Carefully separate offsets with roots and replant them in their own pots.
What type of fertilizer should I use for Alocasia scalprum?
Use a balanced liquid fertilizer with an NPK ratio of 20-20-20 every 4-6 weeks during the growing season for optimal growth.
When should I repot my Alocasia scalprum?
Repot your Alocasia scalprum every 1-2 years or when you see roots growing out of the drainage holes, typically in spring.
Is Alocasia scalprum toxic to pets?
Yes, Alocasia scalprum is toxic to pets and humans if ingested, causing irritation and gastrointestinal distress.
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