10 Best Fertilizer For Arborvitae 2026 in the United States

Miracle-Gro Shake 'N Feed Flowering Trees and Shrubs Plant Food is designed to help flowering trees and shrubs thrive with enhanced green foliage and vibrant blooms. The formulation includes natural ingredients like kelp, earthworm castings, bone meal, and feather meal, which feed plants for up to 3 months. This fertilizer is suitable for in-ground gardens and container plants, specifically targeting acid-loving species.

It’s easy to apply by spreading it on the soil around the plant's base, avoiding direct contact with the trunk or leaves, and watering afterward to initiate feeding. Reapplication every 3 months is recommended for optimal results. Weighing 8 pounds, it is relatively easy to handle and comes in a practical size for multiple applications.

One of the main strengths of this fertilizer is its organic content, which can be beneficial for those looking to maintain a more natural garden. However, it may not be suitable for non-acid-loving plants, and users need to ensure it is compatible with their specific soil pH. Additionally, while it feeds for an extended period, regular reapplication is necessary to maintain plant health. This product is ideal for gardeners seeking a natural, long-lasting fertilizer for their acid-loving flowering trees and shrubs.

Neptune's Harvest Fish & Seaweed Liquid Fertilizer offers a gentle and natural way to feed arborvitae and many other plants. Its NPK ratio of 2-3-1 supplies a moderate amount of nitrogen for leafy growth, a bit more phosphorus to support root and seed development, and some potassium for plant health. Made from 75% fish and 25% seaweed, this fertilizer is fully organic, ideal for those seeking natural gardening options without synthetic chemicals. The seaweed contributes valuable micronutrients and plant hormones that can enhance plant resilience and color.

Arborvitae benefit from these nutrients during their growing season as the fertilizer encourages steady growth and stronger roots. The liquid form allows easy mixing and application, either directly to the soil or sprayed on leaves, making it suitable for indoor or outdoor use. Additionally, this product helps improve soil quality over time by feeding beneficial microbes and enhancing moisture retention, supporting the maintenance of healthy arborvitae soil.

The relatively low nitrogen level means it may not be the best choice for those needing rapid, lush green growth, especially in early spring. Also, because it is slightly acidic due to its fish and seaweed ingredients, checking soil pH beforehand is advisable to ensure it aligns with the arborvitae’s preferred slightly acidic to neutral range. For gardeners wanting an organic, easy-to-use fertilizer that supports soil life and balanced nutrition, Neptune's Harvest is a strong choice, although those requiring a fertilizer specifically tailored for evergreens or with higher nitrogen might consider other options.

The 10-10-10 Plant Fertilizer Slow Release is a versatile option for those looking to support a wide variety of plants, including arborvitae. With its balanced NPK ratio of 10% Nitrogen, 10% Phosphorus, and 10% Potassium, this granular fertilizer is designed to provide a well-rounded nutrient supply that promotes strong roots, lush growth, and vibrant blooms. It's suitable for outdoor and indoor use, making it practical for both garden enthusiasts and those with potted plants.

One of the standout features is its slow-release formula, which can feed plants for up to 8 weeks, reducing the frequency of applications and saving time for busy gardeners. This fertilizer is synthetic, which means it may work quicker but lacks the organic composition some gardeners prefer for maintaining long-term soil health. It is also easy to apply, with fine granules that spread evenly across the soil for maximum absorption, which is beneficial for even coverage in larger garden areas.

While it is marketed as suitable for a variety of plants, including evergreens like arborvitae, understanding your soil’s pH is crucial as it does not detail specific pH compatibility. This product is best suited for users who are looking for a straightforward, all-purpose fertilizer and are comfortable with synthetic options. Those pursuing organic gardening might need to consider supplementary or alternative fertilizers.