Alocasia scalprum, also known as Blue Sword or Purple Sword, is a striking and relatively rare species of Alocasia. Known for its dark, glossy, sword-shaped leaves with purple undersides, this plant requires specific care to thrive. Here’s how to take care of it:

 Light Requirements

• Bright, Indirect Light: Alocasia scalprum does best in bright, indirect light. Too much direct sunlight can scorch its leaves, while too little light can cause slow growth and loss of vibrancy.
• Avoid Low Light: It’s essential to provide enough light to maintain its health, but avoid placing it in direct sun or in too dim a spot.

Watering

• Consistent Moisture: Alocasia scalprum likes consistently moist soil, but it doesn't tolerate soggy conditions. Water when the top 1–2 inches of soil feel dry. Make sure your pot has proper drainage to prevent root rot.
• Humidity: This plant thrives in high humidity (60% or higher). If you live in a dry climate, consider using a humidifier or placing the plant on a tray with water and pebbles to increase humidity around it.

Temperature

• Warm Temperatures: Alocasia scalprum prefers warm temperatures, ideally between 65-80°F (18-27°C). Avoid cold drafts, as it is sensitive to temperatures below 60°F (15°C), which can cause damage.

Soil

• Well-Draining, Rich Soil: Use a lightweight, well-draining potting mix. A mix designed for aroids or a blend of potting soil with perlite or orchid bark can be a good choice. Proper drainage is crucial to prevent waterlogging and root rot.

Fertilizer 

• Balanced Fertilizer: Feed Alocasia scalprum during its growing season (spring and summer) with a balanced, water-soluble fertilizer diluted to half strength. Avoid over-fertilizing, as this can burn the roots or cause an imbalance in nutrients.
• Rest in Winter: In the fall and winter, reduce feeding or stop fertilizing entirely as the plant slows its growth

Repotting 

• Repotting: Repot your Alocasia every 1-2 years or when it outgrows its pot. Choose a pot that is 1-2 inches larger in diameter than the current one.
• Check for Root Rot: When repotting, inspect the roots for any signs of rot, especially if you notice yellowing leaves or poor growth. Trim off any dead or rotting roots before placing the plant in fresh soil.

Pruning

• Trim Dead or Damaged Leaves: Regularly remove any yellow or damaged leaves to keep the plant looking its best. Always use clean scissors to avoid transmitting diseases.

Pests

• Common Pests: Watch out for common pests like aphids, spider mites, and mealybugs. If you notice any infestations, treat the plant with insecticidal soap or neem oil. Regularly inspect the undersides of the leaves for any signs of pests.