Shrub · Rubiaceae
Coffee
Coffea arabica
Give it warmth, bright indirect light, and humid air, and the coffee plant grows into a glossy evergreen that may one day bear its own cherries.
Bright indirect
Every 5–7 days
59–82°F · 15–28°C
USDA 10–11
Overview
The coffee plant is a tropical evergreen from the highland forests of Africa, where it grows in the dappled shade beneath taller trees. In the wild it can reach the size of a small tree, but indoors and in the garden it stays a tidy glossy-leaved shrub. The same plant that fills the world's cups makes a handsome houseplant long before it ever fruits.
Grown at home, coffee is kept for its deep green, waxy foliage as much as for any harvest. With enough warmth and patience it produces fragrant white flowers, followed months later by red cherries that hold the seeds we know as coffee beans. Fruit usually waits until the plant is 3 to 4 years old, so the leaves are the real reward for most growers.
It asks for a few specific things and rewards you when you get them right. Steady warmth, humid air, and bright light filtered through a curtain keep it thriving, while cold drafts and harsh sun set it back fast. Match its forest origins and it stays lush for years.
Care
The short version: bright indirect light, warmth above 60°F (16°C), humid air, and soil kept evenly moist but never soggy, with a monthly feed through the growing season.
Light
Coffee wants bright, indirect light, the kind that pours through a sheer curtain or sits an arm's length from a sunny window. It will take partial shade or partial sun, but hot direct rays scorch the leaves. Give it the brightest spot that doesn't burn.
Water
Keep the soil evenly moist but never soggy, watering about every 5 to 7 days and easing off in winter. Let the surface dry slightly between drinks, then water until it runs from the base. Roots left standing in water are the fastest way to yellow the leaves.
Soil
Plant in an organically rich, well-drained loam on the slightly acidic side, around a pH of 6.0 to 6.5. A peat-based mix with extra perlite holds the moisture coffee likes while still draining freely. Good drainage is what keeps the roots healthy.
Temperature
Aim for a range of 59°F to 82°F (15°C to 28°C) and steady warmth year-round. Cold is the real danger here, with drafts and anything near 50°F (10°C) bringing on sudden leaf drop. Keep it clear of chilly windows in winter.
Humidity
This is a humidity lover that does best at 50% to 80%. In a dry room the leaf edges crisp, so group it with other plants, set it over a pebble tray, or run a small humidifier nearby. The more tropical the air, the better it looks.
Feeding
Feed monthly through spring and summer, while the plant is actively growing, using a balanced or acid-loving liquid fertilizer. Hold off in the cooler months when growth slows. A light, regular feed beats an occasional heavy one.
Pruning
Prune in spring to keep the height and shape in check, since an unchecked plant can stretch tall. Pinch the growing tips to push side branching and a fuller, bushier form. Regular tip pinching is what keeps a young plant dense.
Repotting
Move the plant up a pot every 2 to 3 years in spring, or sooner if it tells you it's cramped. Roots creeping from the drainage holes, growth that stalls, and soil that dries out almost overnight all mean it has outgrown its home. Step up just one size each time.
Size & spacing
Indoors and pruned, coffee stays a manageable shrub, but left to grow it reaches 5 to 10 feet (1.5 to 3 m) tall with a spread of 3 to 6 feet (90 to 180 cm). Give it room for air to move around the canopy, which keeps pests and fungal trouble at bay.
When to plant
Coffee keeps no real planting season indoors and grows year-round wherever it's warm. In the ground it belongs only to the frost-free tropics of zones 10 and 11, set out after all danger of cold has passed. Flowers come in spring and summer, and the cherries that follow take about 6 to 9 months to ripen.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: year-round in warm conditions above 70°F using fresh seed
- Plant: after all frost danger has passed; year-round outdoors in zones 10-11
- Harvest: fragrant white flowers in spring/summer; red cherries ripen about 6-9 months later, usually once the plant is 3-4 years old
Hardiness
USDA hardiness zones: 10–11
Temperature: down to -1°C
Troubleshooting
Most coffee trouble traces back to light, water, or temperature drifting out of the range this forest plant likes. The leaves tell you first, browning, yellowing, or dropping depending on what's wrong. Match what you see below, then adjust before a small slip turns into a bare stem.
Brown, crispy edges or scorched patches on the leaves
This is leaf scorch, and it shows up when hot direct sun meets dry air. Coffee grew up under the forest canopy, so harsh light burns the foliage. Move the plant into bright indirect light and raise the humidity around it, and the new growth comes in clean.
Fix:
- Move to bright indirect light or filtered shade
- Raise humidity by grouping plants or using a humidity tray
Yellow leaves starting near the bottom of the plant
Lower leaves that yellow while the soil stays wet point to overwatering and roots sitting in soggy ground. Coffee wants steady moisture, not a swamp. Cut back on watering, make sure the pot drains freely, and tip out any water left standing in the saucer.
Fix:
- Reduce watering frequency
- Ensure the pot drains freely and empty the saucer
Leaves dropping suddenly after a cold spell
A burst of cold-shock leaf drop usually follows a draft or a night near 50°F (10°C). This is a warmth-loving tropical plant that resents chill. Move it somewhere snug above 60°F (16°C) and keep it clear of cold windows and doors.
Fix:
- Move the plant to a warm spot above 60°F
- Keep away from cold windows and doors
Sticky residue, cottony tufts, or dull stippled leaves
These are the calling cards of sap-sucking pests such as scale, mealybugs, or spider mites. Check the leaf undersides and stems for insects, sticky honeydew, or fine webbing. Wipe them off, treat with insecticidal soap or horticultural oil, and keep the plant on its own until it's clean.
Fix:
- Wipe off pests and treat with insecticidal soap or horticultural oil
- Isolate the plant until controlled
Toxicity
This is a plant to keep well away from animals. Every part holds caffeine and related methylxanthines, from the leaves to the cherries to any spent grounds nearby, and those compounds are toxic to cats, dogs, horses, and more. The roasted bean makes your morning drink, but the raw plant is no treat for pets or children.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Severe
A nibbled leaf or a few beans can leave a cat vomiting and wired, with a racing heart and trembling that may build to seizures. Get to a vet without waiting.
Dogs Severe
Dogs often go for the beans or spent grounds, and the caffeine brings on vomiting, restlessness, a pounding heartbeat, and tremors. Larger doses can tip into seizures.
Horses Toxic
The same caffeine and related methylxanthines hit horses hard, with colic, a quickened pulse, jitteriness, and muscle tremors. Keep all plant parts well out of reach.
Rabbits Toxic
Caffeine is no friend to a rabbit's small body. Even a little of the leaves or cherries can upset the gut and set off a fast, irregular heartbeat, so this plant is off the menu entirely.
Livestock Toxic
Grazing animals like cattle, goats, and sheep can take in dangerous amounts from the foliage and fallen cherries, leading to digestive distress and an over-stimulated heart and nervous system.
Birds Toxic
Birds are sensitive to caffeine, which can trigger an erratic heartbeat, agitation, and tremors. Keep pet birds away from the plant and from any coffee around the house.
People Caution
The roasted, brewed bean is an everyday drink, but the raw plant is a different thing. Chewing the leaves or unripe cherries delivers a rough dose of caffeine, so keep children from sampling it.
Keep the plant, its cherries/beans, and any coffee grounds out of reach of pets and children.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
Poison Control: (800) 222-1222
Canada
Poison Centres: 1-844-764-7669
Varieties
A handful of named Arabica selections turn up among home growers, differing in size, yield, and cup quality. These are the ones worth knowing before you choose.
'Typica'
The original tall heirloom Arabica, prized for cup quality even though it yields less than newer types.
'Bourbon'
A high-quality heirloom that crops more heavily than Typica and carries rounder leaves and cherries.
'Caturra'
A natural Bourbon mutation that packs higher yields onto a shorter, more compact plant.
'Nana' (Dwarf)
A small, bushy selection bred for life in a container and easy growing indoors.
Companions
Plant near
shade trees such as banana or Inga: Provide the filtered light and wind protection coffee prefers, mimicking its natural understory habitat.
Keep apart
turfgrass or aggressive groundcovers at the base: Compete with shallow coffee roots for moisture and nutrients.
How to propagate
You can raise more coffee from seed or from cuttings, and the route you pick decides how long you wait for fruit.
SeedModerate
Spring or year-round in warmth · 2-3 months to germinate; several years to first fruit
Start from fresh seed, since coffee loses viability fast and old seed rarely sprouts. Sown in warmth it takes 2 to 3 months to germinate, and the seedling needs several years of growing before it sets its first fruit. The flowers are self-fertile, so a single plant can still bear cherries.
Stem cuttingsModerate
Warm season · About 6-8 weeks to root
Cuttings give you a faster route to a fruiting plant. Take semi-hardwood pieces about 3/16 to 5/16 inch thick during the warm season, dip the cut end in rooting hormone, and stand them under a humidity tent in moderate shade. Roots form in roughly 6 to 8 weeks.
Myths
Coffee plants must be grown in full sun.
Coffea arabica is a tropical understory shrub that does best in filtered sun or partial shade. Push it into harsh direct light and the leaves scorch. Bright, indirect light is what it actually wants.
Coffee is a tree, not a shrub.
It is a woody evergreen shrub that can grow into a small tree if left alone, and most growers prune it back to shrub size. Both forms are the very same plant, just cut to different heights.
Used or brewed coffee grounds are harmless around pets.
Spent grounds keep plenty of caffeine, and so do the beans and leaves. All of them stay toxic to cats and dogs if eaten, so the grounds belong in a sealed bin, not within a pet's reach.