Choosing the right fertilizer can help crepe myrtle bring out its best blooms, strong branches, and lush foliage. This guide compares select fertilizers designed for crepe myrtles and flowering trees, highlighting how they feed through roots and leaves, their NPK ratios, and application tips. Read on to find options that fit indoor and outdoor setups, container plants, and landscape beds.
| Product | Brand | NPK Focus | Ideal For | Notes |
|---|---|---|---|---|
| Carl Pool Crepe Myrtle Plant Food 24oz 8-55-7 | Carl Pool | 8-55-7 | Crepe myrtle; flowering trees | Feeds through roots and leaves; fast results |
| Crepe Myrtle Fertilizer, Complete Liquid Crepe Myrtle Tree Plant Food, 8 oz | TPS NUTRIENTS | Unknown (liquid) | Crepe myrtle; flowering trees | Complete fertilizer; easy care instructions |
| Crape Myrtle & All Flowering Trees Desert Willow Mimosa Orchid Tree Indoor Outdoor Container Grown Granular Fertilizer NutriStar 10-15-9 (2 lb.) | Nelson Plant Food | 10-15-9 | Flowering trees; containers | NPK with multiple micronutrients |
| Natures Wisdom Crepe Myrtle Tree 8-55-7 Water Soluble Fertilizer | Natures Wisdom | 8-55-7 | Crepe myrtle; shrubs; vines | Balanced blend; optimized for crepe myrtles |
| Leaves and Soul Crepe Myrtle Professional Liquid Fertilizer – 3-5-4 | Leaves and Soul | 3-5-4 | Indoor/outdoor crepe myrtles and ornamentals | Professional-grade; quick absorption |
Carl Pool Crepe Myrtle Plant Food Performance

The Carl Pool Crepe Myrtle Plant Food is formulated to deliver nutrients through both roots and foliage, promoting quicker uptake and noticeable results. With a high phosphorus level, it supports robust flowering and stronger stems, making it suitable for established crepe myrtles and new plantings alike. The 24-ounce size provides ample coverage for mid-sized landscapes. Gardeners can apply in early spring and again after the first flush of blooms to sustain color and vigor. Its nutrient balance aims to encourage vibrant flowers while maintaining healthy foliage.
Crepe Myrtle Fertilizer by TPS Nutrients

This Complete Liquid Crepe Myrtle Tree Plant Food provides a balanced, easy-to-apply solution for flowering trees. The formulation is designed to encourage vibrant blooms, promote strong branch development, and simplify care with straightforward instructions. Liquid blends are often favored for quick nutrient uptake and uniform distribution, making this option practical for both outdoor landscapes and container plantings where even nourishment matters for consistent bloom cycles.
NutriStar 10-15-9 for Flowering Trees

NutriStar 10-15-9 is a multi-purpose granular fertilizer designed to support crepe myrtle and other flowering trees. It contains sulfur, copper, iron, manganese, and zinc to support bloom production and overall plant health. The product emphasizes improved bloom quantity and size, with a formulation that is suitable for both ground beds and container plantings. The blend aims to feed over time, leveraging multiple nitrogen sources for steady growth cycles and extended color display across the season.
Natures Wisdom Crepe Myrtle Tree Fertilizer

Natures Wisdom’s water-soluble Crepe Myrtle Tree fertilizer is formulated at 8-55-7, a ratio that emphasizes bloom production and strong vegetative growth. The product focuses on optimizing the nutrient balance specifically for crepe myrtles, aiming to improve flower clusters and foliage density. Water-soluble formulations can offer rapid uptake, which is beneficial for addressing nutrient gaps quickly. This option is described as versatile for a range of flowering ornamentals beyond crepe myrtles.
Leaves and Soul Crepe Myrtle Liquid Fertilizer

This liquid fertilizer from Leaves and Soul is tailored for crepe myrtles with a balanced 3-5-4 nutrient blend. It emphasizes easy application, rapid absorption, and suitability for both indoor and outdoor use. The professional-grade concentrate is designed to support root development, foliage, and bloom production, helping homeowners achieve showy flower displays and healthy growth across seasons. It is especially convenient for quick replenishment through foliar feeding or soil application.
Buying Guide: Key Purchase Considerations for Crepe Myrtle Fertilizers
- NPK Ratio and Nutrient Balance: Crepe myrtles benefit from a balanced mix that supports blooming (higher phosphorus) and steady vegetative growth (adequate nitrogen). Liquid formulas often offer faster results, while granular blends provide longer-lasting feeding.
- Formulation Type: Choose between granular, liquid, or spikes. Granular products are long-lasting and suitable for in-ground beds, while liquids are quick-acting and ideal for containers or quick corrections. Spikes provide slow release directly at the root zone.
- Targeted vs. Multi-Purpose: Some products are crepe-myrtle specific, while others are multi-featured for flowering trees or ornamentals. If you have a diverse landscape, a multi-purpose option may be convenient; for dedicated crepe myrtles, a targeted product can optimize blooms.
- Application Method: Consider ease of use, whether the product requires watering after application, and whether it can be applied to both new plantings and established trees. Ease of follow-up feeding is a practical factor in busy gardens.
- Container vs. Landscape: For containers, liquids or concentrated solutions that dissolve evenly are often preferred. For landscape beds, slow-release granular formulations can provide consistent nutrition over weeks or months.
- Micronutrients: Some products include trace minerals (iron, zinc, copper) that support bloom intensity and foliage health. These nutrients can enhance coloration and reduce deficiencies in stressed plants.
- Safety and Compatibility: Check for compatibility with other garden practices, such as integrated pest management or other fertilizers. Follow label directions to avoid over-fertilization, which can harm crepe myrtles or surrounding plants.
- Cost and Coverage: Compare price per ounce or per application, and estimate total coverage based on your planting area. Larger landscapes may justify granular options with longer intervals between applications.
- Weather Considerations: In warm climates, crepe myrtles may benefit from spring and post-bloom feedings. In cooler regions, avoid late-season feeding that could promote tender growth susceptible to frost.
- Environmental Impact: Opt for products with responsible packaging and minimal environmental risk. Slow-release formulas typically reduce the risk of nutrient runoff.
