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Arborvitae, a popular evergreen shrub, adds beauty and privacy to gardens. However, during hot summer months, they are prone to dehydration, which can cause browning and needle drop. Protecting these plants from dehydration is essential for maintaining their health and appearance.
Understanding Arborvitae Dehydration
Dehydration occurs when an arborvitae loses more water than it absorbs. Hot, dry, and windy conditions accelerate water loss through transpiration. If not replenished, the plant’s needles can turn brown and drop prematurely, weakening the overall health of the shrub.
Signs of Dehydration
- Needles turning brown at the tips
- Wilting or drooping branches
- Needles dropping prematurely
- Overall dull appearance
Strategies to Protect Arborvitae from Dehydration
1. Water Deeply and Consistently
Ensure the soil remains moist but not waterlogged. Water deeply at the base of the plant, allowing the water to penetrate the root zone. During heatwaves, watering twice a week may be necessary.
2. Mulch Around the Base
Apply a 2-3 inch layer of organic mulch, such as wood chips or bark, around the arborvitae. Mulch helps retain soil moisture, regulate temperature, and reduce water evaporation.
3. Provide Shade During Peak Sunlight
If possible, position shade structures or plant nearby taller plants to shield arborvitae from intense afternoon sun, which increases water loss.
4. Avoid Overfertilizing
Excess fertilizer can promote rapid growth, increasing water demand. Use balanced, slow-release fertilizers and follow recommended application rates.
Additional Tips for Summer Care
Regularly check soil moisture levels with a soil moisture meter. During extreme heat, consider watering early in the morning or late in the evening to minimize water loss through evaporation.
Monitor your arborvitae closely for early signs of dehydration and respond quickly to prevent long-term damage.
Conclusion
Protecting arborvitae from dehydration in summer requires attentive watering, mulching, shading, and proper fertilization. Implementing these strategies helps ensure your arborvitae remains healthy, vibrant, and resilient throughout the hot months.