A guide to caring for Plumeria during winter dormancy, including detailed instructions for storage, greenhouse care, and in-ground planting.

In Storage

1. Temperature Monitoring: Keep the environment between 40-60°F (4-15°C).
2. Humidity Control: Maintain low humidity to prevent rot; use a dehumidifier if necessary.
3. Watering: Only water if branches significantly shrivel, using a minimal amount.
4. Light Conditions: Store away from direct sunlight in a dark or low-light area.
5. Pest Inspection: Check regularly for pests such as spider mites or scale insects.
6. Physical Inspection: Look for signs of rot, particularly at the base and branch tips.
7. Air Circulation: Ensure adequate ventilation to prevent mold and mildew.

In Greenhouses

1. Temperature Regulation: To keep plumeria in their dormant state, it is recommended to maintain temperatures between 40-60°F (4-15°C).
2. Light Management: Provide diffused light; avoid direct, strong sunlight.
3. Watering Schedule: Water very sparingly. Light misting or minimal watering if withering is observed.
4. Soil Moisture Monitoring: Please ensure no excess moisture is caused by dripping condensation.
5. Humidity and Ventilation: Balance humidity levels and ventilate to reduce excess moisture.
6. Air Circulation: It’s important to maintain good air circulation to prevent the growth of mold and mildew. Consider using a fan to keep the air moving.
7. Pest and Disease Control: Regular inspections for pests and diseases.
8. Branch Health: Prune weak or damaged branches to maintain plant health.
9. Soil Condition: Ensure the soil is well-draining.

In the Ground

1. Mulching: Apply mulch around the base for root protection.
2. Watering Reduction: Limit watering; the soil should be dry but not completely desiccated.
3. Frost Protection: Use frost cloth in areas with mild frost. In colder regions, consider relocating the plant indoors.
4. Pest and Disease Watch: Regular inspections for common pests and diseases.
5. Insulation: Insulate the ground in colder climates to maintain consistent root temperature.
6. Debris Clearing: Remove fallen leaves and debris to prevent fungal growth.
7. Branch Check: Examine branches for damage or weakness and prune as necessary.

Additional Considerations

1. Nutrient Management: Avoid fertilizing during dormancy, as it can stimulate growth.
2. Plant Support: In windy areas, provide support to prevent breakage, especially for potted plants in storage or greenhouses.
3. Bare Rooted: If your plumeria is stored without soil, check the roots for rot and make sure they are not touching concrete or other materials that will pull moisture from them.
4. Checking for Dormancy Signs: Identify signs of dormancy (e.g., leaf drop) and adjust care accordingly.
5. Planning for Spring: Towards the end of dormancy, plan to gradually reintroduce water and light to awaken the plant for spring growth.
6. Record Keeping: Record the plant’s health and any issues encountered during dormancy for future reference.

By following these comprehensive guidelines, you can provide the best possible care for your Plumeria during its dormant phase, ensuring a healthy and vigorous growth period in the upcoming season.