This article provides guidance on caring for gardens and citrus trees after wildfire ash deposition. It covers the potential risks of ash, recommended cleaning practices, and specific care tips for citrus trees during dry, windy, and frosty weather.
Oak trees line a street in Altadena where homes were destroyed in the Eaton fire on Wednesday, January 22, 2025. (Photo by Sarah Reingewirtz, Los Angeles Daily News/SCNG)\A recent surge in wildfires has left many homeowners concerned about the safety of their gardens and the produce they grow. Ash from the fires can settle on plants, posing potential risks. Gardeners are advised to thoroughly rinse their plants to remove the ash, as it can interfere with photosynthesis and gas exchange.
If a significant amount of ash has accumulated or there are concerns about hazardous substances, it is recommended to avoid harvesting vegetables until the situation is clearer.\While wood ash from burning vegetation is less likely to contain heavy metals compared to ash from structure fires, it is always a good practice to wash produce thoroughly before consumption. This is a standard precaution regardless of wildfire activity.\Citrus trees require specific attention during periods of dry, windy weather. Despite their tolerance to heat and drought, they can experience dehydration under intense wind conditions. Watch for curling leaves, which indicate water stress. Conversely, avoid overwatering, especially during the rainy season. Remember to adjust automatic irrigation systems accordingly. In frost-prone areas, protect citrus trees with burlap coverings or incandescent Christmas lights when nighttime temperatures dip below 35°F. Damaged leaves from frost should be left intact as they offer protection against further frost damage. Once the threat of frost has passed, trim away the dead leaves. Fertilize citrus trees in late February with a citrus/avocado fertilizer. Applying fertilizer at this time encourages new growth after the risk of frost has subsided. Always follow package instructions for application rates
WILDFIRE ASH GARDEN CARE CITRUS TREES PHOTOSYNTHESIS WATER STRESS
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