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Caladiums are vibrant, tropical plants loved for their colorful foliage. However, they are sensitive to cold temperatures and require proper winter care to thrive year after year. Dividing caladiums is a popular way to propagate and rejuvenate these plants, but winterizing them properly is crucial for their survival during cold weather.
Understanding Caladiums and Their Cold Sensitivity
Caladiums originate from tropical regions and are not frost-hardy. When temperatures drop below 60°F (15°C), they can suffer damage or die back. To ensure their survival through winter, gardeners must take specific steps to protect and store the bulbs, especially when they have been divided to increase their number.
Steps to Winterize Divided Caladiums
1. Timing the Division
Divide caladiums during the dormant period, typically in late fall after the foliage has died back. This minimizes stress on the plant and allows for easier handling of the bulbs.
2. Digging and Dividing
Carefully dig around the caladium clump, avoiding damage to the bulbs. Gently separate the offsets or bulbs using a clean, sharp knife or pruning shears. Remove any damaged or diseased sections.
3. Cleaning and Drying
Brush off excess soil and allow the bulbs to dry in a warm, dry, well-ventilated area for a few days. This helps prevent mold and rot during storage.
4. Storage Conditions
Store the dried bulbs in a paper bag or mesh container filled with peat moss, vermiculite, or sawdust. Keep them in a cool, dark place with temperatures between 50-60°F (10-15°C). Avoid storing in plastic, which can trap moisture and cause rot.
Additional Tips for Successful Wintering
- Label divided bulbs to keep track of varieties.
- Check stored bulbs periodically for signs of mold or rot.
- Replant bulbs in spring after the danger of frost has passed.
- Gradually acclimate the bulbs to outdoor conditions when planting again.
Conclusion
Properly winterizing divided caladiums ensures they will return healthy and vibrant in the next growing season. By timing the division correctly, drying and storing the bulbs properly, and following these simple steps, gardeners can enjoy the beauty of caladiums year after year, even in regions with cold winters.