Fertilising guide
How to fertilise Rivieri Voodoo Lily (Amorphophallus rivieri)— schedule & NPK
Also called rivieri voodoo lily, umbrella arum.
More about rivieri voodoo lily
About Rivieri Voodoo Lily
Amorphophallus rivieri · also called rivieri voodoo lily, umbrella arum · tropical
The rivieri voodoo lily (a name long applied to konjac-type Amorphophallus) grows from a large dormant tuber that throws a single dramatic, foul-smelling flower, then a tall umbrella-like dissected leaf on a mottled snakeskin petiole. It demands a warm growing season, rich moist soil, and a dry winter rest while the tuber sleeps underground.
Growth habit: Tuberous geophyte: a solitary inflorescence emerges first from a dormant corm, followed (or in alternate years) by one large, deeply divided umbrella-shaped leaf on a tall speckled petiole. Dies back to the tuber each winter.
Watch for — No flower for several years: Young or undersized tubers leaf without blooming. The corm must reach sufficient size and store enough energy before it flowers, so feed well and be patient.
What fertiliser rivieri voodoo lily actually wants — and why
Rivieri Voodoo Lily 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 rivieri voodoo lily: 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 rivieri voodoo lily, 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 rivieri voodoo lily:
Feed every 2-3 weeks through active growth with a balanced liquid fertiliser, shifting to a higher-potassium feed late in the season to bulk up the tuber. Stop feeding once the leaf begins to yellow and the plant enters dormancy. Treat that as every 2-3 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 rivieri voodoo lily 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 rivieri voodoo lily
Half strength is the safe default for rivieri voodoo lily — 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 rivieri voodoo lily first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the rivieri voodoo lily watering schedule.
Signs you are over-feeding rivieri voodoo lily
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for rivieri voodoo lily:
- 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 rivieri voodoo lily
- 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 rivieri voodoo lily care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of rivieri voodoo lily 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 rivieri voodoo lily
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 rivieri voodoo lily — frequently asked questions
What fertiliser does rivieri voodoo lily 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. Rivieri Voodoo Lily 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 rivieri voodoo lily?
Feed every 2-3 weeks through active growth with a balanced liquid fertiliser, shifting to a higher-potassium feed late in the season to bulk up the tuber. Stop feeding once the leaf begins to yellow and the plant enters dormancy. Feed every 2-3 weeks through active growth with a balanced liquid fertiliser, shifting to a higher-potassium feed late in the season to bulk up the tuber. Stop feeding once the leaf begins to yellow and the plant enters dormancy. Treat that as every 2-3 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 rivieri voodoo lily?
Half strength is the safe default for rivieri voodoo lily — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding rivieri voodoo lily 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 rivieri voodoo lily 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 rivieri voodoo lily?
Flush the pot of rivieri voodoo lily 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
- Rivieri Voodoo Lily care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water rivieri voodoo lily — 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 5561 fertilising guides in the Growli library