Fertilising guide
How to fertilise Purple Passion Plant (Gynura aurantiaca)— schedule & NPK
Also called purple passion plant, purple velvet plant, royal velvet plant.
More about purple passion plant
About Purple Passion Plant
Gynura aurantiaca · also called purple passion plant, purple velvet plant · houseplant
Gynura aurantiaca is a fast-growing tropical perennial from Indonesia, covered in dense velvety purple hairs that give the leaves an iridescent violet sheen. It needs bright indirect light to keep its vivid colour, grows vigorously in warm conditions, and is confirmed pet-safe by the ASPCA — an unusual combination for such a striking foliage plant.
Growth habit: Fast-growing, trailing or sprawling semi-succulent subshrub; stems become woody and leggy with age
Watch for — Leggy, pale, or green growth: Caused by insufficient light. Move to a brighter spot with some direct morning sun. The plant loses its signature purple hue without adequate light intensity. Pinch tips regularly to encourage bushy growth.
What fertiliser purple passion plant actually wants — and why
Purple Passion 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 purple passion 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 purple passion 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 purple passion plant:
Feed every 2–4 weeks in spring and summer with a balanced liquid fertilizer at half strength. The plant is a vigorous feeder during active growth. Reduce to monthly or suspend entirely in winter. High-nitrogen feeds encourage lush leafy growth. 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 purple passion 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 purple passion plant
Half strength is the safe default for purple passion 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 purple passion plant first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the purple passion plant watering schedule.
Signs you are over-feeding purple passion plant
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for purple passion 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 purple passion 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 purple passion plant care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of purple passion 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 purple passion 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 purple passion plant — frequently asked questions
What fertiliser does purple passion 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. Purple Passion 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 purple passion plant?
Feed every 2–4 weeks in spring and summer with a balanced liquid fertilizer at half strength. The plant is a vigorous feeder during active growth. Reduce to monthly or suspend entirely in winter. High-nitrogen feeds encourage lush leafy growth. Feed every 2–4 weeks in spring and summer with a balanced liquid fertilizer at half strength. The plant is a vigorous feeder during active growth. Reduce to monthly or suspend entirely in winter. High-nitrogen feeds encourage lush leafy growth. 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 purple passion plant?
Half strength is the safe default for purple passion plant — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding purple passion 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 purple passion 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 purple passion plant?
Flush the pot of purple passion 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
- Purple Passion Plant care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water purple passion 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 white-haired crown cactus
- How to fertilise perplexing rebutia
- How to fertilise steinmann's rebutia
- All 6887 fertilising guides in the Growli library