Fertilising guide
How to fertilise Royal Red Lipstick Plant (Aeschynanthus pulcher)— schedule & NPK
Also called Lipstick Plant, Royal Red Lipstick Vine, Basket Plant.
More about royal red lipstick plant
About Royal Red Lipstick Plant
Aeschynanthus pulcher · also called Lipstick Plant, Royal Red Lipstick Vine · houseplant
Royal Red Lipstick Plant is a trailing epiphytic gesneriad prized for its vivid scarlet tubular flowers that emerge from dark burgundy calyces, resembling lipstick. Its glossy, succulent leaves and cascading habit make it ideal for hanging baskets. ASPCA-listed non-toxic — safe around cats and dogs.
Growth habit: Trailing epiphytic evergreen gesneriad
What fertiliser royal red lipstick plant actually wants — and why
Royal Red Lipstick 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 royal red lipstick 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 royal red lipstick 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 royal red lipstick plant:
Apply a balanced liquid fertiliser at half strength monthly from spring through summer. In late summer, switch to a high-potassium orchid or tomato feed to encourage bud formation for the autumn-winter flowering flush. Withhold fertiliser entirely in 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 royal red lipstick 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 royal red lipstick plant
Half strength is the safe default for royal red lipstick 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 royal red lipstick plant first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the royal red lipstick plant watering schedule.
Signs you are over-feeding royal red lipstick plant
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for royal red lipstick 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 royal red lipstick 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 royal red lipstick plant care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of royal red lipstick 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 royal red lipstick 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 royal red lipstick plant — frequently asked questions
What fertiliser does royal red lipstick 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. Royal Red Lipstick 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 royal red lipstick plant?
Apply a balanced liquid fertiliser at half strength monthly from spring through summer. In late summer, switch to a high-potassium orchid or tomato feed to encourage bud formation for the autumn-winter flowering flush. Withhold fertiliser entirely in winter. Apply a balanced liquid fertiliser at half strength monthly from spring through summer. In late summer, switch to a high-potassium orchid or tomato feed to encourage bud formation for the autumn-winter flowering flush. Withhold fertiliser entirely in 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 royal red lipstick plant?
Half strength is the safe default for royal red lipstick plant — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding royal red lipstick 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 royal red lipstick 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 royal red lipstick plant?
Flush the pot of royal red lipstick 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
- Royal Red Lipstick Plant care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water royal red lipstick 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 pearl haworthia
- How to fertilise haworthia turgida
- How to fertilise haworthia pygmaea
- All 11687 fertilising guides in the Growli library