Arborvitae Fertilizing: The Ultimate Guide to Thriving Emerald Greens

Arborvitae, also known as Emerald Greens, are popular evergreen trees due to their vibrant foliage and versatility in landscaping. Proper fertilization is crucial for maintaining their healthy growth and vibrant color. This comprehensive guide will provide detailed instructions on how to fertilize arborvitae effectively.

When to Fertilize Arborvitae

The ideal time to fertilize arborvitae is during the spring and fall seasons. Spring fertilization, typically in March or April, provides essential nutrients for new growth and root development. Fall fertilization, usually in September or October, helps prepare the trees for winter and enhances their cold resistance.

How to Fertilize Arborvitae

1. Choose a Balanced Fertilizer: Select a fertilizer specifically formulated for evergreen trees, such as a 10-10-10 or 12-6-6 NPK ratio.

   

2. Calculate Fertilizer Amount: Determine the amount of fertilizer needed based on the tree's size. Generally, 1/2 pound of fertilizer is recommended for trees under 10 feet tall, and an additional 1/2 pound for each foot of additional height.

3. Spread Fertilizer: Distribute the fertilizer evenly around the base of the tree, approximately 1 foot away from the trunk. Avoid piling fertilizer against the trunk, as this can burn roots.

4. Water Thoroughly: After applying the fertilizer, water the tree deeply to dissolve and distribute the nutrients.

Fertilizing Newly Planted Arborvitae

Newly planted arborvitae require special attention during fertilization.

1. Wait 6-8 Weeks: Allow the tree to establish its root system before fertilizing.

2. Use a Starter Fertilizer: Apply a starter fertilizer with a higher phosphorus content to promote root development. A 10-52-10 NPK ratio is recommended.

3. Follow Instructions Carefully: Follow the instructions on the fertilizer packaging for the recommended amount and application method.

   

Common Mistakes to Avoid

• Overfertilizing: Applying excessive fertilizer can burn roots and hinder growth.
• Fertilizing Too Late in Fall: Late fall fertilization can stimulate new growth, making the tree more susceptible to winter damage.
• Using a Quick-Release Fertilizer: Quick-release fertilizers provide a temporary boost of nutrients that can leach out quickly, resulting in inconsistent growth.
• Ignoring Soil Health: Before fertilizing, test the soil to determine its nutrient levels and pH. Amend the soil as needed to create optimal conditions for arborvitae growth.

Pros and Cons of Arborvitae Fertilization

Pros:

• Enhanced growth and vigor
• Improved foliage color and texture
• Increased cold tolerance
• Reduced susceptibility to pests and diseases

Cons:

• Potential for root burn if overfertilized
• Cost associated with purchasing and applying fertilizer
• Environmental impact if fertilizer is not used responsibly

Additional Tips

• Mulch Around Trees: Spread a layer of organic mulch around the base of the trees to retain moisture and suppress weeds.
• Water Regularly: Consistent watering is essential for nutrient uptake and overall tree health.
• Monitor Tree Growth: Observe the growth and color of the trees to identify any signs of nutrient deficiencies or imbalances.
• Consult a Professional: If you have any concerns or questions, consult a certified arborist for professional advice.

FAQs

1. How often should I fertilize arborvitae?
   - Fertilize twice a year, in spring and fall.

2. What is the best fertilizer for arborvitae?
   - Choose a balanced evergreen tree fertilizer with a 10-10-10 or 12-6-6 NPK ratio.

3. Can I use compost to fertilize arborvitae?
   - Yes, compost can provide a natural source of nutrients, but it is recommended to supplement it with a commercial fertilizer for a more balanced approach.

4. What are the signs of nutrient deficiency in arborvitae?
   - Yellowing leaves, stunted growth, and poor color are common symptoms of nutrient deficiency.

Conclusion

Fertilizing arborvitae is an essential practice to maintain their health, vigor, and vibrant appearance. By following the instructions in this guide, you can ensure that your Emerald Greens flourish and thrive for years to come. Remember to fertilize regularly, avoid common mistakes, and consult a professional when needed.