Fertilising guide
How to fertilise Coffee Plant (Coffea arabica)— schedule & NPK
Also called Coffee plant, Arabian coffee, Arabica coffee, Coffee tree.
More about coffee plant
About Coffee Plant
Coffea arabica · also called Coffee plant, Arabian coffee · tropical
The coffee plant (Coffea arabica) is a glossy-leaved tropical evergreen shrub grown indoors for its handsome foliage and, eventually, fragrant white flowers and red berries. Its one defining care need is consistent moisture in bright but indirect light: it sulks and drops leaves if the rootball dries out or temperatures fall below about 13°C.
Growth habit: An upright, bushy evergreen shrub or small tree with glossy, dark-green, wavy-edged leaves held in tiers along horizontal branches. Indoors it grows steadily and can be pinched or pruned to keep it compact and full. Mature plants produce clusters of fragrant white flowers followed by green berries that ripen to red.
Watch for — Yellowing leaves: Usually overwatering and soggy roots, or sometimes nutrient deficiency in tired compost. Check drainage, let the top of the mix dry slightly between waterings, and feed in the growing season.
What fertiliser coffee plant actually wants — and why
Coffee Plant is an acid-loving plant — it can only take up nutrients in acidic soil, so the feed itself matters less than using an ericaceous formula and never liming.
An ericaceous (acidic) fertiliser, formulated to keep the soil pH low and supply iron and trace elements in a form acid-loving roots can absorb. Ordinary feeds and any lime lock out iron and yellow the leaves.
For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for coffee plant: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.
How often to feed coffee plant, and which months
Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For coffee plant:
Feed every two weeks through spring and summer with a balanced liquid houseplant fertiliser, ideally one slightly acidic or formulated for ericaceous plants. Reduce feeding to monthly or stop entirely over autumn and winter when growth slows. Over-feeding causes salt build-up and leaf-tip burn, so flush the compost with plain water occasionally. In practice: an ericaceous feed in spring as growth resumes, repeated through the main growing months; never apply lime, bonemeal or wood ash, which raise pH.
The dormant-season rule matters more than the exact interval: skip feeding entirely when coffee plant is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.
What strength to mix for coffee plant
Follow the ericaceous product's own rate — these are formulated for the plant, so the dilution on the label is right for coffee plant. The variable that actually matters is pH, not concentration.
Feeding always goes onto already-damp soil, never dry roots — water coffee plant first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the coffee plant watering schedule.
Signs you are over-feeding coffee plant
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for coffee plant:
- Brown, scorched leaf margins from too strong or too frequent a dose.
- White salt crust on the soil surface.
- Soft, lush growth that fruits or flowers poorly.
Signs you are under-feeding coffee plant
- Yellowing leaves with green veins (iron chlorosis from high pH).
- Weak growth, poor cropping and an overall pale, stressed look.
- Stunted new shoots in spring despite adequate water and light.
If the symptoms point at watering, light or roots rather than nutrition, the full coffee plant care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush coffee plant with rainwater (not hard tap water, which raises pH) if salts build up; better still, mulch with pine needles or composted bark and water with rainwater to hold the acidity.
Organic vs synthetic feeds for coffee plant
Organic options
Composted pine bark, pine-needle mulch, used coffee grounds and an organic ericaceous feed gently maintain acidity. UK: Vitax or Westland Ericaceous; US: Espoma Holly-tone or Dr. Earth Acid Lovers. Slow, soil-improving, hard to overdo.
Synthetic / liquid feeds
A liquid or granular ericaceous feed — UK: Miracle-Gro Ericaceous, Vitax or Westland; US: Miracle-Gro Acid-Loving Plant Food or Espoma Holly-tone. Pair with rainwater and an acidic mulch for it to work.
Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.
Fertilising coffee plant — frequently asked questions
What fertiliser does coffee plant need?
An ericaceous (acidic) fertiliser, formulated to keep the soil pH low and supply iron and trace elements in a form acid-loving roots can absorb. Ordinary feeds and any lime lock out iron and yellow the leaves. Coffee Plant is an acid-loving plant — it can only take up nutrients in acidic soil, so the feed itself matters less than using an ericaceous formula and never liming.
How often should I feed coffee plant?
Feed every two weeks through spring and summer with a balanced liquid houseplant fertiliser, ideally one slightly acidic or formulated for ericaceous plants. Reduce feeding to monthly or stop entirely over autumn and winter when growth slows. Over-feeding causes salt build-up and leaf-tip burn, so flush the compost with plain water occasionally. Feed every two weeks through spring and summer with a balanced liquid houseplant fertiliser, ideally one slightly acidic or formulated for ericaceous plants. Reduce feeding to monthly or stop entirely over autumn and winter when growth slows. Over-feeding causes salt build-up and leaf-tip burn, so flush the compost with plain water occasionally. In practice: an ericaceous feed in spring as growth resumes, repeated through the main growing months; never apply lime, bonemeal or wood ash, which raise pH.
What strength of feed for coffee plant?
Follow the ericaceous product's own rate — these are formulated for the plant, so the dilution on the label is right for coffee plant. The variable that actually matters is pH, not concentration.
What does over-feeding coffee plant look like?
Brown, scorched leaf margins from too strong or too frequent a dose. White salt crust on the soil surface. Soft, lush growth that fruits or flowers poorly. Feeding coffee plant an ordinary fertiliser, or growing it in hard tap water / limey soil, is the defining mistake — it triggers lime-induced chlorosis (yellow leaves, green veins) no amount of feeding fixes until the pH comes down.
Should I flush the soil of coffee plant?
Flush coffee plant with rainwater (not hard tap water, which raises pH) if salts build up; better still, mulch with pine needles or composted bark and water with rainwater to hold the acidity.
Keep reading
- Coffee Plant care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water coffee plant — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise monstera
- How to fertilise pothos
- How to fertilise fiddle leaf fig
- All 271 fertilising guides in the Growli library