Fertilising guide
How to fertilise Black Gold clog plant (Nematanthus 'Black Gold')— schedule & NPK
Also called Black Gold clog plant, Black Gold goldfish plant.
More about black gold clog plant
About Black Gold clog plant
Nematanthus 'Black Gold' · also called Black Gold clog plant, Black Gold goldfish plant · houseplant
A dramatic Nematanthus hybrid cultivar distinguished by its very dark, near-black glossy foliage and brilliant gold-orange pouched flowers that provide striking contrast. An excellent hanging-basket plant that blooms prolifically in good indirect light. Like other clog plants, it needs warm, humid indoor conditions and consistent but not excessive moisture to perform at its best.
Growth habit: Trailing epiphytic subshrub
What fertiliser black gold clog plant actually wants — and why
Black Gold clog 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 black gold clog 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 black gold clog 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 black gold clog plant:
Feed every 3–4 weeks in the growing season with a balanced liquid fertilizer at half the recommended strength. When buds begin to form, switch to a high-potassium formula (e.g., tomato feed) to boost flowering. Do not feed in winter. 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 black gold clog 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 black gold clog plant
Half strength is the safe default for black gold clog 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 black gold clog plant first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the black gold clog plant watering schedule.
Signs you are over-feeding black gold clog plant
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for black gold clog 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 black gold clog 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 black gold clog plant care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of black gold clog 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 black gold clog 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 black gold clog plant — frequently asked questions
What fertiliser does black gold clog 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. Black Gold clog 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 black gold clog plant?
Feed every 3–4 weeks in the growing season with a balanced liquid fertilizer at half the recommended strength. When buds begin to form, switch to a high-potassium formula (e.g., tomato feed) to boost flowering. Do not feed in winter. Feed every 3–4 weeks in the growing season with a balanced liquid fertilizer at half the recommended strength. When buds begin to form, switch to a high-potassium formula (e.g., tomato feed) to boost flowering. Do not feed in winter. 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 black gold clog plant?
Half strength is the safe default for black gold clog plant — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding black gold clog 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 black gold clog 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 black gold clog plant?
Flush the pot of black gold clog 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
- Black Gold clog plant care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water black gold clog 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 maranta bicolor
- How to fertilise stromanthe sanguinea
- How to fertilise stromanthe sanguinea magicstar
- All 6887 fertilising guides in the Growli library