Fertilising guide
How to fertilise Violet Corkscrew Plant (Genlisea violacea)— schedule & NPK
Also called Violet Corkscrew Plant, Corkscrew Plant.
More about violet corkscrew plant
About Violet Corkscrew Plant
Genlisea violacea · also called Violet Corkscrew Plant, Corkscrew Plant · tropical
Genlisea violacea is a small tropical carnivorous plant from the montane grasslands and rocky seeps of the Serra do Caraça and surrounding highlands of south-eastern Brazil. Above the growing medium it forms a delicate rosette of spatula-shaped green leaves, while below the surface it deploys unique corkscrew-shaped underground traps that lure and digest protists and other micro-organisms. It bears attractive small purple flowers and is one of the more accessible Genlisea species for experienced carnivorous-plant growers. This species is not listed by the ASPCA and should be treated with caution around pets.
Growth habit: Low-growing rosette-forming perennial with spatula-shaped aerial leaves and invisible corkscrew traps underground.
Watch for — Substrate drying out: Even brief drying of the growing medium kills the delicate underground traps and can cause the whole plant to collapse; check the tray water level daily and never allow the sphagnum or peat to pale or contract.
What fertiliser violet corkscrew plant actually wants — and why
Violet Corkscrew 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 violet corkscrew 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 violet corkscrew 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 violet corkscrew plant:
Apply diluted MaxSea or orchid fertiliser at 1/8 strength as a foliar mist every 4–6 weeks; the underground traps supply most nutrients, so supplemental feeding should be minimal. Treat that as sparingly through the growing season 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 violet corkscrew 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 violet corkscrew plant
Half strength is the safe default for violet corkscrew 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 violet corkscrew plant first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the violet corkscrew plant watering schedule.
Signs you are over-feeding violet corkscrew plant
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for violet corkscrew 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 violet corkscrew 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 violet corkscrew plant care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of violet corkscrew 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 violet corkscrew 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 violet corkscrew plant — frequently asked questions
What fertiliser does violet corkscrew 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. Violet Corkscrew 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 violet corkscrew plant?
Apply diluted MaxSea or orchid fertiliser at 1/8 strength as a foliar mist every 4–6 weeks; the underground traps supply most nutrients, so supplemental feeding should be minimal. Apply diluted MaxSea or orchid fertiliser at 1/8 strength as a foliar mist every 4–6 weeks; the underground traps supply most nutrients, so supplemental feeding should be minimal. Treat that as sparingly through the growing season 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 violet corkscrew plant?
Half strength is the safe default for violet corkscrew plant — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding violet corkscrew 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 violet corkscrew 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 violet corkscrew plant?
Flush the pot of violet corkscrew 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
- Violet Corkscrew Plant care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water violet corkscrew 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 anthurium berriozabalense
- How to fertilise anthurium ochranthum
- How to fertilise anthurium consobrinum
- All 10153 fertilising guides in the Growli library