6 Essential Tips for Fertilizing Arborvitae for Lush, Thriving Growth

The Importance of Fertilizing Arborvitae

Arborvitae trees are popular landscape staples, prized for their dense, emerald-green foliage and ability to create privacy screens and windbreaks. However, like all plants, arborvitae require proper fertilization to maintain their health and vigor.

According to the National Arborist Association, arborvitae trees generally require between 1 and 2 pounds of nitrogen per 1,000 square feet of canopy area per year. This translates to approximately 1/2 to 1 pound of nitrogen per tree per year for small to medium-sized trees.

Best Time to Fertilize Arborvitae

The optimal time to fertilize arborvitae is in the spring, when the trees are actively growing. Fertilizing in the fall can also be beneficial, but avoid fertilizing too late in the season, as this can encourage new growth that may not have time to harden off before the onset of winter.

Selecting the Right Fertilizer for Arborvitae

When selecting a fertilizer for arborvitae, choose one that is balanced and contains equal amounts of nitrogen (N), phosphorus (P), and potassium (K). A 10-10-10 fertilizer is a good general-purpose option.

How to Fertilize Arborvitae

1. Spread fertilizer around the base of the tree. Create a ring of fertilizer that extends to the drip line of the tree (the area beneath the outermost branches).
2. Water the fertilizer in thoroughly. This will help the fertilizer dissolve and reach the tree's roots.
3. Avoid overfertilizing. Overfertilization can damage arborvitae roots and cause browning of the foliage.

Tips and Tricks

• Use a slow-release fertilizer to provide gradual nutrition over time.
• If your arborvitae tree is showing signs of nutrient deficiency (such as yellowing leaves or stunted growth), consider increasing the application rate of fertilizer.
• Mulch around your arborvitae trees to help retain moisture and suppress weeds.

Common Mistakes to Avoid

• Fertilizing too often. Fertilizing arborvitae more than once a year is unnecessary and can lead to problems.
• Fertilizing too late in the season. Fertilizing arborvitae in the fall can encourage new growth that may not have time to harden off before winter.
• Overwatering. Overwatering can lead to root rot and other problems.
• Planting arborvitae in poorly drained soil. Arborvitae trees prefer well-drained soil. If your soil is poorly drained, amend it with compost or other organic matter to improve drainage.

Comparison of Fertilizers for Arborvitae

Arborvitae Fertilization Chart

Frequency of Arborvitae Fertilization

Conclusion

Fertilizing arborvitae is essential for maintaining their health, vigor, and appearance. By following the tips and tricks outlined in this article, you can ensure that your arborvitae trees thrive for years to come.