Fertilising guide
How to fertilise Red Ti Plant (Cordyline fruticosa 'Red Sister')— schedule & NPK
Also called Red Sister ti plant, red ti.
More about red ti plant
About Red Ti Plant
Cordyline fruticosa 'Red Sister' · also called Red Sister ti plant, red ti · tropical
The Red Sister ti plant is a vivid Cordyline fruticosa cultivar prized for new growth that emerges magenta-pink and matures to deep burgundy. Strong colour demands bright light. It is a thirsty, humidity-loving tropical that resents fluoride and salts, often showing leaf-tip burn in tap water. Indoors it forms an upright, cane-like clump of arching, sword-shaped leaves.
Growth habit: Upright, cane-forming evergreen shrub with a rosette of arching, sword-shaped leaves at the top of woody stems; lower leaves shed over time to reveal bare canes.
Watch for — Brown leaf tips and margins: Usually fluoride, chlorine or salt sensitivity from tap water, or low humidity. Switch to filtered or rainwater and raise humidity.
What fertiliser red ti plant actually wants — and why
Red Ti 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 red ti 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 red ti 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 red ti plant:
Feed monthly through spring and summer with a balanced, diluted liquid fertiliser at half strength; flush the pot occasionally to clear salt buildup, which ti plants are prone to. Stop feeding in autumn and winter. 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 red ti 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 red ti plant
Half strength is the safe default for red ti 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 red ti plant first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the red ti plant watering schedule.
Signs you are over-feeding red ti plant
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for red ti 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 red ti 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 red ti plant care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of red ti 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 red ti 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 red ti plant — frequently asked questions
What fertiliser does red ti 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. Red Ti 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 red ti plant?
Feed monthly through spring and summer with a balanced, diluted liquid fertiliser at half strength; flush the pot occasionally to clear salt buildup, which ti plants are prone to. Stop feeding in autumn and winter. Feed monthly through spring and summer with a balanced, diluted liquid fertiliser at half strength; flush the pot occasionally to clear salt buildup, which ti plants are prone to. Stop feeding in autumn and winter. 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 red ti plant?
Half strength is the safe default for red ti plant — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding red ti 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 red ti 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 red ti plant?
Flush the pot of red ti 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
- Red Ti Plant care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water red ti 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 2464 fertilising guides in the Growli library