10 Best Fertilizer For Crepe Myrtles 2026 in the United States

Farmer’s Secret Fruit & Bloom Booster is a liquid fertilizer designed to encourage abundant flowering and fruiting, making it suitable for crepe myrtles which benefit from strong blooms. It is highly concentrated, so only a small amount (1 teaspoon per 2 gallons of water) is needed, which can be cost-effective over time. The fertilizer is easy to apply by mixing with water and using every 2-4 weeks during the growing season.

The formula emphasizes root strength and nutrient uptake to boost blooms, implying a balanced nutrient mix that supports flowering plants well. Its liquid form allows for quick absorption but requires regular application, which might require more effort compared to slow-release fertilizers.

This product is a versatile and easy-to-use fertilizer focused on enhancing flowering and fruit yield, making it a strong candidate for a wide variety of fruiting and flowering plants, including crepe myrtles.

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.