10 Best Fertilizer For Crepe Myrtles 2026 in the United States

Osmocote Smart-Release Plant Food Plus is a granular fertilizer designed to feed plants, including crepe myrtles, for up to six months with a steady supply of nutrients. It contains 11 essential nutrients, which is beneficial since crepe myrtles need a balanced mix of nitrogen, phosphorus, and potassium (NPK) along with micronutrients for healthy growth and vibrant blooms. The product’s unique resin coating controls nutrient release based on temperature, helping prevent over-fertilizing and the risk of burning plants.

This slow-release feature means fewer applications are needed—typically just twice a year—which is convenient for busy gardeners. The fertilizer is synthetic but offers a no-burn guarantee when used as directed, making it safer for your plants compared to some quick-release options. It covers a good area (up to 300 sq. ft. per 8-pound container), which is suitable for multiple crepe myrtles or other garden plants.

If you want a reliable, low-maintenance fertilizer that feeds over time and supports healthy plant growth without frequent applications, Osmocote Smart-Release is a solid choice for crepe myrtles and other outdoor plants.

The Osmocote Smart-Release Plant Food with an NPK ratio of 14-14-14 is a balanced, synthetic slow-release fertilizer designed to support strong roots and healthy growth in perennials, including crepe myrtles. Its granule form and smart-release technology mean nutrients are released gradually, controlled by soil temperature, which helps feed plants steadily and reduces the risk of burning—even if you accidentally apply more than recommended. This makes it user-friendly and forgiving, especially for beginners.

It includes some micronutrients beneficial for overall plant health. The instructions suggest mixing the fertilizer into the top few inches of soil, with one pound covering about 40 square feet, which is practical for garden beds or mulched areas around trees. Because it is synthetic and not organic, it may not fit preferences for organic gardening.

This fertilizer promotes vigorous growth but does not provide additional nutrient boosts tailored especially for crepe myrtles compared to more specialized fertilizers. It suits gardeners who want a reliable, easy-to-use fertilizer to keep crepe myrtles and similar plants healthy with less hassle.

Miracle-Gro Water Soluble All Purpose Plant Food is a versatile fertilizer designed for a variety of plants, including flowers, vegetables, trees, shrubs, and houseplants. It aims to promote rapid growth and vibrant results. One of its significant strengths is the NPK ratio, which is well-balanced for general plant health but may not be specialized enough for specific needs like crepe myrtles.

This fertilizer is synthetic, meaning it provides quick results, but some gardeners might prefer organic options for a more natural approach. It contains essential micronutrients, which are beneficial for plant health. The application frequency is convenient, allowing for flexible use both indoors and outdoors with varying amounts depending on the plant type. It’s easy to apply using a watering can or the Miracle-Gro Garden Feeder, making it user-friendly even for those new to gardening.

However, the broad application might not meet the specific requirements of crepe myrtles as precisely as a specialized fertilizer would. Additionally, while the product supports substantial coverage, which is excellent for large gardens, it may be more than needed for smaller spaces. In conclusion, this product is effective for a wide range of plants but might not be the most targeted choice for crepe myrtles if you're looking for a fertilizer that caters specifically to their unique needs.