They’re easy to care for as long as you provide the nitrogen needed to maintain the lush foliage.
When to Fertilize Boxwood
Boxwood shrubs can be fertilized from late autumn into early spring.
Late summer and early autumn applications also promote new growth vulnerable to frost damage.
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Boxwood growing in containers may need more frequent feeding.
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Fertilize potted boxwood
Container-grown boxwoods can also be fed with slow-release, granular, urea-based fertilizers.
Best Fertilizer for Boxwood
Evergreen shrubs like boxwood tend to use a lot of nitrogen.
Always follow label directions for the correct method and amount for program.
Nitrogen fertilizers raise acidity in soil
It’s important to test the soil around your boxwoods regularly.
Too much nitrogen can raise soil acidity and inhibit the shrub’s ability to absorb nutrients.
Can You Over Fertilize Boxwood?
If the soil has sufficient nitrogen, adding a nitrogen fertilizer can cause root burn.
Foliage turns brown, growth becomes sparse and leggy, and shrubs take on a wilted appearance.
They may drop leaves, lose branches, and attract pests and disease.
If you notice these symptoms, flush the soil surrounding the shrub.
Pooling water can also damage roots, so double-check the planting area has good drainage.
Give the shrub time to recover and put out some new green growth.
Retest your soil to determine the pH level before adding nutrients.
A good growing environment will help your overfed boxwood recover.
When soil is low on nitrogen and magnesium epsom salts can raise levels.
Epsom salts are a form of magnesium included in most fertilizer formulas.
Coffee grounds include nitrogen, phosphorous and potassium; the three main nutrients all plants need.
Compost them well, and use sparingly.
Overuse leads to compacted soil too acidic for boxwoods.
