Best Fertilizer Spikes for Crepe Myrtle Trees and Bloom Support
The best fertilizer spikes for crepe myrtle are tree-and-shrub formulas that suit the plant’s size and can be placed near its roots. The SimplyGro 8-8-8 spikes are the clearest fit for shoppers who want a listed nutrient ratio and feeding duration. Miracle-Gro is another spike option, while the three crepe-myrtle-specific liquid foods are alternatives for buyers willing to use liquid fertilizer instead.
| Product | Best For | Format |
|---|---|---|
| SimplyGro Tree & Shrub Spikes | Buyers wanting a stated 8-8-8 formula | Spikes |
| Miracle-Gro Tree & Shrub Spikes | Buyers seeking a named tree-and-shrub spike product | Spikes |
| Crepe Myrtle Fertilizer, 8 oz | Small-scale liquid feeding | Liquid |
| Crepe Myrtle Fertilizer, 32 oz | Gardeners prioritizing bloom and root support | Liquid |
| Crepe Myrtle Fertilizer, 1 Gal | Buyers tending multiple landscape trees | Liquid |
SimplyGro Tree & Shrub Fertilizer Spikes
Best for: Crepe myrtle owners who want a general-purpose spike with a clearly stated nutrient ratio. Each spike has an 8-8-8 formula: nitrogen for growth and color, phosphorus for flowering, and potassium for roots. The listing says the spikes feed trees and shrubs continuously for up to three months.
The pre-measured, five-inch spikes are designed to deliver nutrients below the soil surface near roots. The product is described for deciduous, coniferous, ornamental, flowering, and fruiting trees and shrubs, making it a reasonable general tree-and-shrub choice for a crepe myrtle.
Limitation: This is not described as a crepe-myrtle-specific formula. The listing recommends spring and fall applications, but follow the package directions for placement and amount based on tree size.
Miracle-Gro Tree & Shrub Spikes
Best for: Buyers specifically looking for a branded tree-and-shrub spike product in a 12-spike pack. Its listed name identifies it as plant food spikes for trees and shrubs, so it matches the requested application format more directly than the liquid alternatives.
Choose this if you prefer pre-formed spikes over mixing or pouring a liquid product. The supplied product information does not include a nutrient analysis, feeding interval, or detailed application directions, so check the package to confirm the formula and how many spikes to use for your crepe myrtle.
Limitation: Available details are limited to the product name and pack size. It is harder to compare its nutrient ratio and feeding duration with the SimplyGro spikes based on the supplied information.
Crepe Myrtle Liquid Fertilizer, 8 Oz
Best for: Gardeners seeking a crepe-myrtle-labeled liquid product in a smaller container. The name describes it as liquid plant food intended to support long-lasting blooms. It is an alternative rather than a fertilizer spike, so it may suit buyers who prefer liquid feeding.
Limitation: The supplied information does not state its nutrient analysis, dilution rate, or application schedule. Follow the product label, and do not assume its use or timing matches spike instructions.
Crepe Myrtle Liquid Fertilizer, 32 Oz
Best for: Buyers who want a crepe-myrtle-specific liquid food with stated bloom and root support. The listing says it helps promote abundant, colorful blooms, supports strong roots and steady tree development, and is intended for outdoor planting, yards, and decorative landscapes.
Choose this over a general shrub spike if a product specifically labeled for crape myrtle is more important than a pre-measured solid format. It is a liquid product, not a spike, and the supplied details do not provide nutrient percentages or usage directions.
Crepe Myrtle Liquid Fertilizer, 1 Gallon
Best for: Gardeners who want a larger-format liquid option for landscape or garden trees. The listed benefits include support for vibrant blooms, healthy roots, and steady tree development. It shares the same stated intended use as the 32-ounce product but comes in a one-gallon size.
Limitation: This is not a spike product, and the supplied description does not state how much to apply or how frequently. Check the label before choosing it for a particular tree or number of plants.
Buying Guide: How To Choose Fertilizer For Crepe Myrtle
Should you choose spikes or liquid fertilizer?
Spikes are pre-formed and placed in soil, while liquid fertilizer is applied according to its label directions. Choose spikes if you want a solid, pre-measured format; choose liquid if you prefer a product specifically labeled for crepe myrtle or need a format that can be measured and applied as directed. These products should not be treated as interchangeable without checking their instructions.
Which nutrient information matters?
Compare the N-P-K analysis, which lists nitrogen, phosphorus, and potassium. Of these products, SimplyGro provides a stated 8-8-8 ratio. The other listed descriptions do not provide nutrient percentages, so review each package or label if nutrient analysis is a deciding factor.
How should spike amount and timing be decided?
Use the product label to determine spike quantity, spacing, and timing for the tree. SimplyGro’s listing says each spike feeds for up to three months and recommends spring and fall applications. The Miracle-Gro details provided here do not state an interval. Avoid guessing based only on the number of spikes in a package.
Does more fertilizer mean more blooms?
Not necessarily. A fertilizer label may describe bloom support, but product descriptions alone do not establish that applying extra fertilizer improves flowering. Follow the labeled amount and consider the plant’s growing conditions when assessing its performance.
Frequently Asked Questions
What is the best fertilizer spike for crepe myrtle in this list?
SimplyGro is the most comparison-friendly spike option here because its listing specifies an 8-8-8 formula and feeding duration of up to three months.
Are all five products fertilizer spikes?
No. SimplyGro and Miracle-Gro are listed as spikes. The other three products are liquid crepe-myrtle fertilizers.
Can I use tree-and-shrub spikes on a crepe myrtle?
SimplyGro is described for trees and shrubs, including flowering varieties. Check its label for directions that fit the size and planting conditions of your tree.
Which liquid product is described as supporting blooms and roots?
The 32-ounce and one-gallon crepe-myrtle liquid products both list bloom and root support among their stated benefits.
How often should I fertilize a crepe myrtle?
Use the schedule printed on the selected product. The supplied SimplyGro details mention spring and fall applications; the other product descriptions do not give a complete schedule.