Rohdea japonica, commonly known as the sacred lily or Japanese sacred lily, is a hardy evergreen perennial native to East Asia. It thrives in shaded, humid environments, making it an excellent choice for indoor cultivation. Its glossy, strap-like leaves and occasional red berries add ornamental value, while its low-maintenance nature appeals to plant enthusiasts.
Rohdea japonica prefers indirect or filtered light, mimicking its natural understory habitat. Direct sunlight can scorch its leaves, so place it near an east- or north-facing window. If natural light is insufficient, supplement with fluorescent or LED grow lights for 6–8 hours daily.
Use well-draining, slightly acidic soil (pH 5.5–6.5) rich in organic matter. A mix of peat moss, perlite, and pine bark works well. Choose a pot with drainage holes to prevent waterlogging. Repot every 2–3 years in spring to refresh the soil and accommodate root growth.
Keep the soil consistently moist but not soggy. Water when the top 1–2 inches of soil feel dry, typically once a week. Reduce frequency in winter. Use lukewarm, filtered water to avoid chlorine damage. Overwatering can lead to root rot, while underwatering causes leaf browning.
Maintain humidity levels of 50–70% by misting leaves, using a humidifier, or placing the pot on a pebble tray. Ideal temperatures range between 60–75°F (15–24°C). Avoid drafts and sudden temperature fluctuations, which can stress the plant.
Feed monthly during the growing season (spring to fall) with a balanced, diluted liquid fertilizer (10-10-10). Avoid fertilizing in winter when growth slows. Over-fertilization can cause salt buildup, so flush the soil with water every few months.
Remove yellow or damaged leaves at the base to encourage new growth. Wipe leaves with a damp cloth to remove dust and improve photosynthesis. Trim spent flower stalks unless seed propagation is desired.
Common pests include spider mites and mealybugs. Treat infestations with insecticidal soap or neem oil. Prevent fungal diseases by ensuring proper airflow and avoiding wet foliage. Isolate affected plants promptly.
Propagate via division during repotting. Gently separate offsets with roots and plant them in fresh soil. Seed propagation is slower; sow seeds in moist soil and keep them warm (70°F/21°C) until germination.
In winter, reduce watering and stop fertilizing. Protect the plant from cold windows. In summer, shield it from excessive heat by moving it away from direct sunlight. Rotate the pot periodically for even growth.
