Maintaining Syzygium Christina, or the Christina Rose Apple, involves several key practices to ensure its health and productivity:

1. Watering: Keep the soil consistently moist, especially during dry periods. However, avoid waterlogging, as this can lead to root rot. Water the plant when the top inch of soil feels dry.
2. Soil: Plant in well-drained, fertile soil. A pH range of 5.5 to 6.5 is ideal. You might consider amending the soil with compost or organic matter to improve its fertility and drainage.
3. Sunlight: Provide the plant with full sun to partial shade. Ideally, it should receive at least 6 hours of direct sunlight each day.
4. Fertilization: Feed the plant with a balanced, slow-release fertilizer during the growing season (spring and summer). Follow the manufacturer’s instructions for the correct amount and frequency.
5. Pruning: Regularly prune to maintain the plant’s shape and remove any dead or diseased branches. This also helps improve air circulation and light penetration.
6. Pest and Disease Management: Monitor for common pests such as aphids, scale insects, or spider mites. Also, watch for signs of fungal or bacterial infections. Treat any issues promptly with appropriate organic or chemical solutions.
7. Mulching: Apply mulch around the base of the plant to help retain soil moisture and suppress weeds. Keep the mulch away from the trunk to prevent rot.
8. Temperature: Syzygium Christina prefers warm climates. Protect it from frost or extreme cold by covering it or moving potted plants indoors during colder months.

By following these maintenance tips, you can ensure that your Syzygium Christina remains healthy and continues to produce its attractive and flavorful fruit.