Overwintering Persian Shield in Cold Climates: Indoor Care vs. Forced Dormancy

Persian shield (Strobilanthes dyerianus) is a tropical shrub hardy only to zones 9–10. In zone 6, it cannot survive outdoors. You have three options:

Plan B – Indoor Tropical Care: Bring it in immediately. Provide bright light, no drafts, and high humidity (use a humidifier). Keep it warm and moist—like its native Burma jungle. It may grow slowly but will survive.

Plan C – Forced Dormancy (Difficult): Gradually expose to cooler temperatures, reduce watering to near zero (mist leaves only), and store in a cool, dark, non-freezing spot until spring. This is tricky; too much moisture causes rot, too little causes desiccation. No research exists on dormancy triggers for this species.

Plan D – Cuttings (Best Backup): Take cuttings with bottom heat and high humidity. If the parent plant fails, you’ll have new starts for summer.

Given the challenges, indoor tropical care (Plan B) with a humidifier is your most reliable approach. Consider adding orchids—they enjoy the same conditions.