If you’re looking for a simple way to boost crepe myrtle blooms and overall health, fertilizer spikes that feed trees and shrubs directly at the roots are a strong option. These spikes are best for homeowners seeking low-effort feeding with steady nutrient delivery. The top picks below are designed for crepe myrtles, with some also great for hydrangeas and other acid-loving plants. The buyer-friendly table summarizes key details to compare at a glance.
| Product | Spike Type | Best For | Approx. Contents | Notes |
|---|---|---|---|---|
| Miracle-Gro Tree & Shrub Plant Food Spikes | Spikes | All-season feeding for crepe myrtle trees and shrubs | 12 Spikes, 3 lb | Slow release to roots; good for color and foliage |
| The Old Farmer’s Almanac Tree & Shrub Fertilizer Spikes (Box of 24) | Spikes | Robust nutrition for trees and evergreens | 24 Spikes, 5 lb | Hammer-in design; simple seasonal feeding |
| The Old Farmer’s Almanac Tree & Shrub Fertilizer Spikes (Box of 12) | Spikes | Seasonal feed for smaller landscapes | 12 Spikes, 3 lb | Compact option with TruSpike |
| SIMPLYGRO Old Farmer’s Almanac 1.5 lbs. TruSpikes (6-Count) | Spikes | Natural, measured feed for crepe myrtle and ornamentals | 6 Spikes | Natural formulation with TruSpike design |
| Crepe Myrtle Fertilizer – Liquid Plant Food (not spikes) 32 oz | Liquid (non-spike) | Alternative feeding method when spikes not ideal | 32 oz | Liquid option; included for comparison |
Miracle-Gro Tree & Shrub Plant Food Spikes
Best for color and foliage maintenance in deciduous and evergreen trees and shrubs. This product delivers slow-release nutrients directly to roots, promoting vibrant color and healthy growth. It’s suitable for acid-loving plants such as hydrangeas, azaleas, and magnolias, making it a versatile option for landscapes with crepe myrtles nearby. The spikes are easy to install and require minimal maintenance.
Who this is best for: homeowners wanting a straightforward, seasonal feeding routine for crepe myrtles and allied plants. Why selected: well-known brand, direct-root delivery, and compatibility with acid-loving plant varieties often grown around crepe myrtles. Caution: avoid over-application; follow the label for seasonal feeding to prevent root burn.
The Old Farmer’s Almanac Tree & Shrub Fertilizer Spikes (Box of 24 Spikes)
Best for larger landscapes and longer feeding cycles, this box provides a robust nutrition profile that lasts several weeks to months, supporting trees, evergreens, and shrubs. The 5-inch TruSpike is hammered into the ground, delivering steady nutrients to root zones. It’s a practical choice for crepe myrtles planted in larger yards or in mixed borders with other ornamentals.
Who this is best for: buyers managing bigger properties or multiple crepe myrtles. Why selected: the multiple-spike format reduces frequent reapplication, and the TruSpike design helps resist breakage. Caution: ensure proper hammering to avoid misalignment and ensure soil isn’t overly compacted around insertion points.
The Old Farmer’s Almanac Tree & Shrub Fertilizer Spikes (Box of 12)
Best for seasonal feeding of crepe myrtles with a compact spike count. Each 5-inch TruSpike is designed to deliver nutrition efficiently and consistently for several weeks. The 13-3-3 nutrient formula supports vibrant leaf color, flowering, and strong root systems. This option suits homeowners seeking predictable, low-maintenance care for a smaller collection.
Who this is best for: gardeners with a smaller number of crepe myrtles or shrubs. Why selected: compact package and proven TruSpike performance. Caution: follow the seasonal feeding schedule to maximize results and avoid excessive feeding in early spring when growth is slow.
SIMPLYGRO Old Farmer’s Almanac TruSpikes (6-Count)
Best for natural, measured feeding aligned with the Old Farmer’s Almanac approach. This 6-count TruSpike package targets crepe myrtle trees and shrubs, delivering a steady nutrient supply over time. It’s a compact choice suitable for a few crepe myrtles or mixed borders. Limitation: smaller quantity may require more frequent replacement for larger landscapes.
Who this is best for: buyers preferring a natural formulation and a simple hammer-in method. Why selected: consistent release and compatibility with other Almanac fertilizers. Caution: not ideal for very large trees requiring higher nutrient loads at once.
Buying Guide: Key Considerations For Fertilizer Spikes
- Application method: Spikes are hammered into the soil around the root zone. Choose spikes that fit your soil depth and your ability to install safely without damaging roots.
- Nutrient composition: Look for formulas tailored to bloom enhancement and root growth. A balanced mix like N-P-K around 13-3-3 or similar levels supports crepe myrtles well.
- Seasonal timing: Most spike products are designed for early spring feeding and mid-summer maintenance. Follow manufacturer guidance to avoid overfeeding.
- Plant compatibility: Ensure spikes are suitable for deciduous and flowering trees. Some formulas also support acid-loving companions like hydrangeas nearby.
- Size of landscape: Larger yards with multiple crepe myrtles benefit from multi-spike boxes. For a few plants, smaller packs may suffice.
- Durability and ease of use: Look for durable spikes that resist breakage and simple hammer-in installation for consistent results.
Frequently Asked Questions
- What are fertilizer spikes? They are slow-release nutrients placed directly at the root zone to feed trees and shrubs over time.
- Are spikes safe for crepe myrtle roots? Yes when applied according to label directions; avoid excessive insertion depth and overfeeding.
- How often should crepe myrtles be fed with spikes? Most products suggest seasonal feeding—early spring and sometimes late fall or summer adjustments—depending on the brand.
- Can spikes replace liquid fertilizers? Spikes provide steady root feeding, while liquids offer quick, soluble nutrients; choose based on timing and plant needs.
- Do spikes work for hydrangeas near crepe myrtle plantings? Some spikes are suitable for acid-loving plants; check label compatibility for hydrangeas.
- Is there a risk of root damage from hammering spikes? Use proper hammering technique and avoid hitting the root crown; follow depth recommendations on the package.