Fertilising guide
How to fertilise Cape honeysuckle (Tecoma capensis)— schedule & NPK
Also called Cape honeysuckle, Cape trumpet vine, Tecomaria.
More about cape honeysuckle
About Cape honeysuckle
Tecoma capensis · also called Cape honeysuckle, Cape trumpet vine · tropical
A South African evergreen scrambling shrub-vine producing long-lasting clusters of vivid orange-red tubular flowers, highly attractive to hummingbirds and sunbirds. Adaptable to drought, poor soils, and coastal exposure once established, it thrives outdoors in USDA zones 9–11 and makes an excellent screening hedge or wall plant. Grows in full sun with minimal maintenance.
Growth habit: Evergreen scrambling shrub or lax climber
Watch for — Hawkmoth caterpillar feeding: Large hawkmoth larvae can cause significant defoliation in summer. Remove caterpillars by hand; the plant recovers quickly and the damage is rarely fatal to a well-established specimen.
What fertiliser cape honeysuckle actually wants — and why
Cape honeysuckle 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 cape honeysuckle: 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 cape honeysuckle, 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 cape honeysuckle:
Feed with a balanced fertiliser in spring and again in midsummer. Avoid excess nitrogen which encourages lush leafy growth at the expense of flowers. Established plants in good soil may need very little supplemental feeding. 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 cape honeysuckle 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 cape honeysuckle
Half strength is the safe default for cape honeysuckle — 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 cape honeysuckle first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the cape honeysuckle watering schedule.
Signs you are over-feeding cape honeysuckle
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for cape honeysuckle:
- 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 cape honeysuckle
- 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 cape honeysuckle care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of cape honeysuckle 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 cape honeysuckle
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 cape honeysuckle — frequently asked questions
What fertiliser does cape honeysuckle 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. Cape honeysuckle 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 cape honeysuckle?
Feed with a balanced fertiliser in spring and again in midsummer. Avoid excess nitrogen which encourages lush leafy growth at the expense of flowers. Established plants in good soil may need very little supplemental feeding. Feed with a balanced fertiliser in spring and again in midsummer. Avoid excess nitrogen which encourages lush leafy growth at the expense of flowers. Established plants in good soil may need very little supplemental feeding. 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 cape honeysuckle?
Half strength is the safe default for cape honeysuckle — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding cape honeysuckle 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 cape honeysuckle 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 cape honeysuckle?
Flush the pot of cape honeysuckle 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
- Cape honeysuckle care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water cape honeysuckle — 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 wandering orthophytum
- How to fertilise boat-leaf orthophytum
- How to fertilise pineapple bromeliad
- All 6887 fertilising guides in the Growli library