Syngonium Three Kings thrives in a well-draining potting soil that is rich in nutrients and organic matter. Coco coir or peat-based bagged potting soil mixes are suitable options. Fertilize with a ½ – ¼ strength complete liquid fertilizer every two weeks during the growing season. Slow-release fertilizers or top dressing with worm castings or compost can also be beneficial. Avoid over-fertilizing to prevent salt buildup.