Fertilising guide
How to fertilise Corn Plant (Dracaena fragrans)— schedule & NPK
Also called Corn plant, Cornstalk plant, Cornstalk dracaena, Dracaena, Mass cane.
More about corn plant
About Corn Plant
Dracaena fragrans · also called Corn plant, Cornstalk plant · houseplant
The corn plant is a slow-growing tropical foliage houseplant grown for its glossy, arching strap-like leaves on upright woody canes. Its one defining care need is gentle, consistent moisture with sensitivity to fluoride and salts: water with the top inch dry, ideally using filtered or rainwater to prevent the trademark brown leaf tips.
Growth habit: A slow-growing, evergreen tropical shrub with an erect, often multi-trunked form. Glossy, arching strap-shaped leaves emerge in rosettes from the tops of thick woody canes, giving the classic palm-like silhouette. Lower leaves naturally yellow and drop with age, gradually exposing the bare cane below.
Watch for — Brown leaf tips and margins: Most often caused by fluoride or salt build-up from tap water and fertiliser, or by low humidity. Switch to filtered or rainwater, flush the pot periodically, and ease off feeding.
What fertiliser corn plant actually wants — and why
Corn Plant is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula.
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 corn 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 corn 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 corn plant:
Feed with a balanced liquid houseplant fertiliser at half strength roughly monthly during spring and summer, and not at all in winter when growth stalls. It is a light feeder; over-fertilising builds up salts that scorch the leaf tips. Flushing the pot with plain water every few months helps wash accumulated salts away. Treat that as monthly between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
The dormant-season rule matters more than the exact interval: skip feeding entirely when corn 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 corn plant
Half strength is the safe default for corn plant — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
Feeding always goes onto already-damp soil, never dry roots — water corn plant first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the corn plant watering schedule.
Signs you are over-feeding corn plant
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for corn plant:
- Brown, crispy leaf tips and edges with no sign of underwatering.
- A white, crusty salt deposit on the soil surface or pot rim.
- Weak, pale, stretched new growth that flops.
- Lower leaves yellow and drop while the soil is correctly watered.
Signs you are under-feeding corn plant
- Uniformly pale or yellow-green leaves, oldest first.
- Noticeably small new leaves and stalled growth in good light and season.
- A generally tired, lacklustre look despite correct watering and light.
If the symptoms point at watering, light or roots rather than nutrition, the full corn plant care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of corn plant with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Organic vs synthetic feeds for corn plant
Organic options
A diluted seaweed or worm-casting feed, or fish emulsion if you can tolerate the smell indoors. UK: Westland or Baby Bio Organic, dilute seaweed; US: Espoma Indoor! or Neptune's Harvest fish & seaweed. Slow, gentle and hard to overdo.
Synthetic / liquid feeds
A general-purpose houseplant liquid at half strength — UK: Baby Bio, Westland Houseplant Feed or Phostrogen; US: Miracle-Gro Indoor Plant Food or Schultz. Convenient and fast-acting; the only risk is overdoing it.
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 corn plant — frequently asked questions
What fertiliser does corn plant need?
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula. Corn Plant is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
How often should I feed corn plant?
Feed with a balanced liquid houseplant fertiliser at half strength roughly monthly during spring and summer, and not at all in winter when growth stalls. It is a light feeder; over-fertilising builds up salts that scorch the leaf tips. Flushing the pot with plain water every few months helps wash accumulated salts away. Feed with a balanced liquid houseplant fertiliser at half strength roughly monthly during spring and summer, and not at all in winter when growth stalls. It is a light feeder; over-fertilising builds up salts that scorch the leaf tips. Flushing the pot with plain water every few months helps wash accumulated salts away. Treat that as monthly between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
What strength of feed for corn plant?
Half strength is the safe default for corn plant — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding corn plant look like?
Brown, crispy leaf tips and edges with no sign of underwatering. A white, crusty salt deposit on the soil surface or pot rim. Weak, pale, stretched new growth that flops. Lower leaves yellow and drop while the soil is correctly watered. Feeding corn plant year-round on a fixed schedule, including dark winter months, is the most common mistake — it cannot use the nutrients in low light and the surplus simply burns the roots and crusts the soil.
Should I flush the soil of corn plant?
Flush the pot of corn plant with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Keep reading
- Corn Plant care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water corn 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 snake plant
- How to fertilise dracaena
- How to fertilise peperomia
- All 271 fertilising guides in the Growli library