Fertilising guide
How to fertilise Canna 'Bengal Tiger' (Canna 'Bengal Tiger')— schedule & NPK
Also called Bengal Tiger Canna, Pretoria Canna.
More about canna 'bengal tiger'
About Canna 'Bengal Tiger'
Canna 'Bengal Tiger' · also called Bengal Tiger Canna, Pretoria Canna · flowering
Canna 'Bengal Tiger' (syn. 'Pretoria') is one of the most striking cannas, with broad, bold green leaves striped in bright yellow-gold along the veins, and vivid orange flowers. It is widely grown as a tropical-accent specimen in borders and large containers. Full sun and ample moisture bring out its best. Rhizomes must be overwintered indoors in frost-prone areas. Mildly toxic to pets.
Growth habit: Vigorous upright rhizomatous perennial with striped foliage
Watch for — Canna leaf roller: Caterpillars of the Brazilian skipper roll and feed within young leaves, leaving ragged holes. Remove by hand or apply Bt spray early in the caterpillar stage.
What fertiliser canna 'bengal tiger' actually wants — and why
Canna 'Bengal Tiger' 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 canna 'bengal tiger': 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 canna 'bengal tiger', 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 canna 'bengal tiger':
Apply a high-potassium liquid feed every 2 weeks from early summer to encourage flowering alongside the lush foliage. A slow-release granular fertiliser worked into the planting hole provides a sustained background nutrient supply. Treat that as every 2 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 canna 'bengal tiger' 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 canna 'bengal tiger'
Half strength is the safe default for canna 'bengal tiger' — 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 canna 'bengal tiger' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the canna 'bengal tiger' watering schedule.
Signs you are over-feeding canna 'bengal tiger'
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for canna 'bengal tiger':
- 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 canna 'bengal tiger'
- 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 canna 'bengal tiger' care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of canna 'bengal tiger' 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 canna 'bengal tiger'
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 canna 'bengal tiger' — frequently asked questions
What fertiliser does canna 'bengal tiger' 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. Canna 'Bengal Tiger' 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 canna 'bengal tiger'?
Apply a high-potassium liquid feed every 2 weeks from early summer to encourage flowering alongside the lush foliage. A slow-release granular fertiliser worked into the planting hole provides a sustained background nutrient supply. Apply a high-potassium liquid feed every 2 weeks from early summer to encourage flowering alongside the lush foliage. A slow-release granular fertiliser worked into the planting hole provides a sustained background nutrient supply. Treat that as every 2 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 canna 'bengal tiger'?
Half strength is the safe default for canna 'bengal tiger' — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding canna 'bengal tiger' 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 canna 'bengal tiger' 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 canna 'bengal tiger'?
Flush the pot of canna 'bengal tiger' 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
- Canna 'Bengal Tiger' care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water canna 'bengal tiger' — 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 dendrobium 'emma white'
- How to fertilise dendrobium loddigesii
- How to fertilise cattleya walkeriana
- All 11687 fertilising guides in the Growli library