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Growing navel oranges in colder climates can be challenging due to frost and freezing temperatures. One effective method to protect these citrus trees during winter is using row covers. Properly deploying row covers can help ensure a healthy harvest and prevent winter damage.
Understanding Row Covers
Row covers are lightweight fabrics that create a protective barrier over plants. They allow sunlight, air, and water to reach the plants while shielding them from cold temperatures, frost, and wind. For overwintering navel oranges, selecting the right type of cover is essential for optimal protection.
Choosing the Right Row Cover
- Frost Cloths: Made from spunbond polypropylene, these are ideal for cold protection and are breathable.
- Floating Row Covers: Lightweight and easy to deploy, suitable for mild to moderate cold.
- Heavy-duty Fabrics: For severe cold, consider thicker covers that offer more insulation.
Preparing Your Navel Oranges for Covering
Before covering, ensure your trees are healthy and well-watered. Remove any debris or weeds around the base. Prune dead or damaged branches to promote good airflow and reduce disease risk.
Applying Row Covers
Follow these steps for effective application:
- Lay the cover flat over the tree, ensuring it extends at least a foot beyond the canopy on all sides.
- Secure the edges with soil, bricks, or stakes to prevent wind from lifting the cover.
- Ensure the cover is not tightly wrapped around the branches to allow air circulation.
Maintaining and Monitoring
During winter, regularly check the covers for damage or displacement. Remove snow accumulation carefully to prevent excess weight. Ventilate during warm days to prevent humidity buildup, which can lead to fungal issues.
Additional Tips for Success
- Use temporary supports like hoops or stakes to prevent the fabric from sagging.
- Combine row covers with other frost protection methods, such as mulching or heating.
- Remove the covers in early spring once the risk of frost has passed to allow the trees to acclimate.
Conclusion
Proper use of row covers can significantly increase the chances of overwintering navel oranges successfully. By selecting appropriate materials, applying them correctly, and maintaining them throughout the winter, you can protect your citrus trees from harsh weather and enjoy fresh oranges year after year.