The Philodendron White Knight is a rare and highly sought-after cultivar of Philodendron gloriosum, known for its large, heart-shaped leaves with velvety green foliage and prominent white veins. Here are some care tips to help you nurture your Philodendron White Knight:

1. Light: Provide bright, indirect light for your Philodendron White Knight. It thrives in bright, filtered light but can tolerate medium light conditions. Avoid direct sunlight, as it can scorch the leaves and cause damage.

2. Watering: Keep the soil evenly moist during the growing season (spring and summer). Water when the top inch or two of soil feels dry, but avoid allowing the soil to dry out completely. In winter, reduce watering slightly, allowing the top half of the soil to dry out between waterings.

3. Humidity: Philodendron White Knight prefers moderate to high humidity. It can adapt to average indoor humidity levels but benefits from occasional misting or placement near a humidifier, especially in dry indoor environments.

4. Temperature: Normal room temperatures between 65-80°F (18-27°C) are ideal for Philodendron White Knight. It can tolerate slightly cooler temperatures but should be protected from drafts and sudden temperature fluctuations.

5. Soil: Use a well-draining potting mix rich in organic matter. A mixture of peat moss, perlite, and orchid bark or sand works well. Ensure the pot has drainage holes to prevent water from accumulating at the bottom.

6. Fertilizing: Feed your Philodendron White Knight every 4-6 weeks during the growing season with a balanced liquid fertilizer diluted to half strength. Reduce feeding in fall and winter when growth slows down.

7. Support: As Philodendron White Knight matures, it may benefit from a support or moss pole to help it climb. This can encourage larger leaf development and maintain an upright growth habit.

8. Pruning: Remove any yellow or dead leaves as they appear to maintain the plant's health and appearance. Prune back leggy stems to promote bushier growth.

9. Propagation: Philodendron White Knight can be propagated from stem cuttings. Take a cutting with at least one node and place it in water or directly in moist soil. Roots should develop within a few weeks.

10. Pests: Monitor for common houseplant pests like spider mites, mealybugs, and aphids. Treat any infestations promptly with insecticidal soap or neem oil.

Philodendron White Knight is a stunning and relatively rare plant that requires attentive care to thrive. With proper lighting, watering, humidity, and occasional fertilization, your Philodendron White Knight can grow vigorously and display its beautiful foliage to its fullest potential.