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Do coffee grounds fertilize evergreens?
Spent coffee grounds contain small amounts of nutrients, but that does not make them a complete or predictable fertilizer. University of Maine Cooperative Extension describes them as best used in moderate amounts as a soil conditioner or as an ingredient in compost (University of Maine Cooperative Extension).
There is no established evergreen-specific trial outcome showing that coffee grounds improve growth. An evergreen’s needs depend on its species, condition, and soil; grounds alone cannot diagnose or correct a nutrient problem.
Best way to reuse grounds: compost them
Add used grounds to an active compost pile as one ingredient among other materials. University of Maine and University of Nebraska–Lincoln Extension both recommend composting as a practical reuse route (Nebraska Extension guidance). The guidance does not establish a grounds-only compost recipe or a dose of grounds-based fertilizer.
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- Excellent for evergreens, dogwoods, hydrangeas, magnolias and many other acid-loving trees and shrubs
- Encourages vigorous root growth and lush foliage
- Feeds for up to 2 months
- Easy to use—simply apply directly to soil
- Safe—won't burn your plants when used as directed Based on manufacturer's direction for use.
How to apply grounds directly around an evergreen
If you choose a surface application instead of composting, use a thin, broken-up layer rather than a thick mat. Nebraska Extension’s October 2024 guidance sets a maximum layer of one-half inch and recommends covering it with leaves or shredded bark. This is practical regional guidance, not a universal dose for every plant or landscape.
Fine grounds can compact and impede the movement of air and moisture. Oregon State University Extension also advises keeping a surface layer thin and broken up because dried grounds may repel water (Oregon State University Extension response).
Rank #2
- Made for Evergreen Trees – Formulated to support healthy growth in evergreen and conifer trees.
- Supports Needle Health & Root Strength – Helps encourage vibrant needles and steady tree development.
- Balanced Nutrition for Long-Term Growth – Provides nutrients suited for year-round evergreen health.
- Ideal for Landscape & Yard Trees – Suitable for lawns, gardens, and outdoor tree plantings.
- Made in USA
- Spread grounds sparingly over the soil surface; do not pile them against the trunk or stems.
- Break up clumps so the grounds do not form a dense, continuous layer.
- Cover the thin layer with leaves or shredded bark.
What if you want to mix grounds into the soil?
An Oregon State Extension response advises adding nitrogen fertilizer when grounds are worked directly into soil. It does not specify an evergreen species, fertilizer formulation, rate, or soil-test result, so this is not a blanket recommendation to add nitrogen. For a particular evergreen, follow local soil-test guidance before adding fertilizer.
Will coffee grounds make soil acidic?
No dependable soil-acidifying effect should be expected from spent grounds. University of Maine Cooperative Extension reports a pH range of 6.5–6.8 for spent grounds; Penn State Extension gives an approximate value of 6.8. These near-neutral figures do not support using brewed grounds to lower garden soil pH (Penn State Extension).
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- Made for Evergreen Trees – Formulated to support healthy growth in evergreen and conifer trees.
- Supports Needle Health & Root Strength – Helps encourage vibrant needles and steady tree development.
- Balanced Nutrition for Long-Term Growth – Provides nutrients suited for year-round evergreen health.
- Ideal for Landscape & Yard Trees – Suitable for lawns, gardens, and outdoor tree plantings.
- Made in USA
If an evergreen is struggling or you suspect the soil pH is unsuitable, identify the plant and get an appropriate soil test. Nebraska Extension identifies elemental sulfur as its preferred pH-lowering product when a soil test supports the need, but that regional guidance should not be treated as a universal prescription. Follow recommendations from a local extension service or soil-testing laboratory.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When should an evergreen be fertilized?
Do not fertilize every evergreen automatically. University of Maryland Extension advises fertilizing evergreens only when a soil-test report recommends it (University of Maryland Extension guidance). A soil report can help distinguish a nutrient need from a pH issue or another cause of poor condition.
Quick Recap
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- FOR USE ON: Use Evergreen-tone organic fertilizer for all needle leaf and broadleaf evergreens. This includes pine, fir spruce, juniper as well as azaleas, rhododendron and camellias
- CONTAINS: Evergreen-tone is a rich blend of the finest natural & organic ingredients enhanced with our exclusive Bio-tone formula; 4-3-4 Fertilizer analysis with 5% Sulfur. Contains no sludges or fillers.
- WHEN / HOW TO USE: Best to use Evergreen-tone fertilizer when planting or feeding established plants; most evergreens are best fed twice each year in early Spring and late Fall. Evergreen-tone is ready to use and requires no mixing
- FOR ORGANIC GARDENING: Evergreen-tone is approved for organic gardening; It is a registered Organic Input Material meaning it meets all requirements for organic production
- MADE IN THE USA: Product of the Espoma Company. The leader in natural organics since 1929
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- Jobe's Evergreen Tree & Shrub Fertilizer Spikes (15-Pack)
- Fertilizer spikes specially formulated for evergreens. Slow-release to prevent burning
- Formulation 13-3-4
- Count 15 Spikes
- Feeding Period Up to 90 Days
- Use composted grounds as a reuse option, not as a guaranteed fertilizer.
- Use a thin, covered surface dressing only if you choose to apply grounds directly.
- Base fertilizer and pH corrections on a soil test and plant-specific, local guidance.
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