Choosing the right fertilizer for crape myrtle can boost blooming, promote deep-green foliage, and strengthen roots for seasons to come. This guide highlights five top-rated options available online, with notes on how each supports flowering trees in American landscapes. Read on to compare formulas, application guidance, and what to consider when selecting a product for your crape myrtle care schedule.
| Product | Brand | Key Benefit |
|---|---|---|
| Crepe Myrtle Plant Food 24oz 8-55-7 | Pool | Balanced NPK with root and leaf feeding |
| Crepe Myrtle Fertilizer, 8 oz | Complete fertilizer for thriving blooms | |
| Crape Myrtle & All Flowering Trees NutriStar (2 lb.) | Nelson Plant Food Store | Granular fertilizer designed for flowering trees |
| BioAdvanced 12 Month Tree and Shrub Protect and Feed | BioAdvanced Store | One application with year-long protection |
| Crape Myrtle 10-15-9 NutriStar (2 lb.) | Nelson Plant Food Store | High phosphorus and micronutrients for blooms |
Crepe Myrtle Plant Food 24oz 8-55-7

This 24-ounce crepe myrtle plant food uses an 8-55-7 ratio, favoring phosphorus to stimulate strong root systems and abundant blooms. The formula is described as feeding through both roots and leaves, supporting immediate and sustained uptake. Ideal for established trees needing a bloom boost after pruning or in the growing season. Apply according to label directions to avoid over-fertilization and to maintain soil health.
Crepe Myrtle Fertilizer, Complete Liquid Crepe Myrtle Tree Plant Food, 8 oz

This liquid fertilizer provides a complete nutrient mix designed for crepe myrtle trees, aiming to promote vibrant blooms and robust branch growth. The product emphasizes ease of use with straightforward care instructions. Liquid formats can deliver nutrients quickly, particularly useful for stressed trees recovering from drought or heat. Follow label guidelines for dilution and frequency to maintain soil balance and avoid burn.
Crape Myrtle & All Flowering Trees NutriStar Granular Fertilizer (4 lb.)

NutriStar granular fertilizer is marketed for crape myrtle and other flowering trees, offering a balanced mix to support flowering and overall tree health. The product is described as suitable for both indoor/outdoor container growing and traditional in-ground plantings. Its granular form allows for slow, steady nutrient release, which can minimize growth flushes that lead to weak wood. Apply according to package directions to maximize bloom production and tree resilience.
NutriStar 10-15-9 Granular Fertilizer (2 lb.)

This NutriStar formulation provides a higher phosphorus content (10-15-9) with micronutrients designed to encourage more blooms, larger flower size, and increased bloom density. The package notes support for a wide range of flowering trees, including crape myrtle, and recommends top-dressing or incorporating at planting. Use as directed to optimize flowering while maintaining soil health and nutrient balance.
Buying Guide
Key purchase considerations help ensure the selected fertilizer meets your crape myrtle’s needs:
- NPK ratio and plant stage: Early-season growth often benefits from balanced or slightly higher nitrogen, while flowering emphasis relies on phosphorus-rich formulas. For established trees, phosphorus-enhanced options can improve bloom quantity and size.
- Application method: Granular fertilizers require yard applications and water to start release. Liquid formats are absorbed quickly via leaves and roots, useful for rapid responses but may need more frequent reapplication.
- Soil and climate considerations: In hot, sandy, or clay-heavy soils, choosing a product with micronutrients (iron, manganese, zinc) can support chlorophyll production and flowering in challenging conditions.
- Longevity and protection: Some products offer extended protection against pests or disease alongside nourishment. Consider whether year-round protection aligns with your landscape goals.
- Container vs. ground planting: Container-grown crape myrtle may require more frequent feeding with balanced formulas to compensate for limited soil volume, while in-ground trees benefit from slower-release options.
- Environmental impact: Opt for fertilizers with minimal risk of runoff and clear application instructions. Always follow label directions to protect surrounding plants and water sources.
- Maintenance integration: Align fertilizer timing with pruning schedules and irrigation routines for a cohesive care plan that supports bloom cycles and tree vigor.
Across these options, consider your tree’s age, current health, and local climate when selecting a fertilizer for crape myrtle. Combining the right product with proper watering, pruning, and sun exposure will help maximize bloom display and long-term tree vitality.