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Fertilising guide

How to fertilise Corn plant (Dracaena fragrans)— schedule & NPK

Also called mass cane, cornstalk dracaena, fragrant dracaena.

About Corn plant

Dracaena fragrans · also called mass cane, cornstalk dracaena · houseplant

Dracaena fragrans is a tropical African shrub grown indoors as a tree-form with thick canes and broad strap leaves often striped yellow. Tolerant of low light, dry air, and neglect, it is a staple office plant. Mildly toxic to pets through saponins.

Dracaena fragrans, the corn plant, is a slow-growing evergreen shrub-tree native to tropical Africa (including Angola, Sudan, and Mozambique), often grown as a thick-caned 'cane' specimen.

Feed lightly during active growth only; it is a slow grower with modest nutrient needs and excess feeding salts worsen tip browning.

Growth habit: Tree-form with multiple woody canes

Sources: aspca.org, getbusygardening.com

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:

Quarter-strength balanced feed every 6-8 weeks during growth. Treat that as every 6-8 weeks 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:

Signs you are under-feeding corn plant

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?

Quarter-strength balanced feed every 6-8 weeks during growth. Quarter-strength balanced feed every 6-8 weeks during growth. Treat that as every 6-8 weeks 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.

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