When to Fertilize Plants, Trees, and Shrubs in Acadiana
Knowing when to fertilize plants in Acadiana is just as important as knowing what fertilizer to use.In South Louisiana, fertilizing too early can cause cold damage, while fertilizing too late can stress plants during extreme heat. For homeowners in Lafayette, Youngsville, Broussard, and surrounding Acadiana areas, proper fertilizer timing leads to stronger roots, healthier growth, and better flowering.
Why Fertilizer Timing Matters in South Louisiana
Acadiana’s warm climate causes plants to respond quickly to nutrients. Fertilizer should only be applied when plants are actively growing and able to absorb nutrients efficiently. Poor timing can result in:
- Weak, leggy growth
- Reduced flowering
- Increased pest and disease pressure
- Nutrient runoff and wasted fertilizer
When to Fertilize Shrubs in Acadiana
Most ornamental shrubs should be fertilized in early spring, after the risk of hard freezes has passed.
Best timing:
- Late February through March
- Optional light feeding in early summer
Avoid fertilizing shrubs in fall or winter. This can encourage tender growth that is easily damaged by cold. Common shrubs that benefit from spring fertilization include azaleas, gardenias, hollies, boxwoods, camellias, and ligustrum.
When to Fertilize Trees in Acadiana
Trees generally require less fertilizer than shrubs, but timing is still important.
Best timing for trees:
- Late winter to early spring (February–March)
- When soil temperatures begin to warm
This supports root development without forcing excessive top growth. Native trees such as live oaks, magnolias, and maples often require little to no fertilizer unless soil tests indicate a deficiency.
Avoid fertilizing trees in late summer or fall.
When to Fertilize Flowers and Bedding Plants
Annual flowers and perennials benefit from fertilizer once they are actively growing.
Best timing:
- At planting with a balanced fertilizer
- Light, consistent feedings during the growing season
Over-fertilizing can lead to more leaves and fewer blooms, especially in spring flowers.
Fertilizer Timing Chart by Plant Type (Acadiana)
Shrubs
| Plant Type | Best Fertilizing Time | Notes |
|---|---|---|
| Azaleas | March (after bloom) | Use acid-loving fertilizer |
| Gardenias | March–April | Avoid late-season feeding |
| Hollies & Boxwoods | February–March | Light summer feeding optional |
| Camellias | After flowering | Do not fertilize in fall |
Trees
| Plant Type | Best Fertilizing Time | Notes |
|---|---|---|
| Live Oaks | Feb–March | Often not needed unless stressed |
| Magnolias | March | Light feeding only |
| Maples | Feb–March | Avoid late summer fertilization |
| Fruit Trees (non-citrus) | Feb–March | Supports bloom and fruit set |
| Citrus Trees | March–May | Multiple light feedings |
Flowers & Bedding Plants
| Plant Type | Best Fertilizing Time | Notes |
|---|---|---|
| Spring Annuals | At planting | Light feeding early |
| Summer Annuals | After soil warms | Regular light feedings |
| Perennials | Early spring | Avoid heavy fertilizer |
Common Fertilization Mistakes in Acadiana
- Fertilizing too early before freeze risk passes
- Using lawn fertilizer on shrubs and trees
- Applying too much fertilizer at once
- Fertilizing during extreme heat or drought
More fertilizer does not equal better results.
Fertilize With a Plan, Not Guesswork
Proper fertilization in Acadiana landscapes requires correct timing, appropriate products, and an understanding of plant-specific needs. At Acadiana Landscape Materials, fertilization is part of a complete landscape care approach—focused on long-term plant health, not quick fixes. If you’re unsure when to fertilize your plants, trees, or shrubs, professional guidance can help protect your investment and keep your landscape looking its best year-round.