Place your Stromanthe Triostar medium a warm, well-lit spot. The more indirect light the plant receives, the more variegation you will see on the leaves. Never expose it to direct sunlight, you will see burn spot on the leaves.
Keep the soil of your Stromanthe Triostar slightly damp (but not soggy!) and allow the top inch to dry out before watering again.
Triostar loves a humid environment, so feel free to mist every day. Use a pebble tray or a humidifier during the winter months when the air tends to be much drier. The leaves will turn brown and crispy when the air is too dry.