Soil & potting mix
Best soil for Black Gold Goldfish Plant (Nematanthus 'Black Gold')
Also called Black Gold Goldfish Plant, Black Goldfish Plant, Goldfish Plant.
More about black gold goldfish plant
About Black Gold Goldfish Plant
Nematanthus 'Black Gold' · also called Black Gold Goldfish Plant, Black Goldfish Plant · houseplant
A trailing Gesneriad hybrid bearing shiny, deep green to near-black leaves and bright orange-red pouched flowers that mimic leaping goldfish. Low-maintenance and rewarding, it tolerates average humidity and produces blooms freely when given bright indirect light. Ideal for hanging baskets and shelved displays.
Preferred mix: Well-draining, organic-rich potting mix
Watch for — Root rot: The most common problem — caused by overwatering or poorly drained soil. Ensure the pot has drainage holes and the top few centimetres dry out before re-watering. Remove mushy roots and repot into fresh, drier mix if rot is found.
Why black gold goldfish plant needs this mix
Black Gold Goldfish Plant is an easy-going houseplant — it just wants a free-draining general mix that holds some moisture but never stays soggy.
- Black Gold Goldfish Plant is adaptable, but like most houseplants it still needs air at the roots — a mix that drains freely while holding a working moisture reserve.
- A little perlite or bark stops ordinary compost compacting into an airless block over time, which is the slow, common cause of decline.
- It is not fussy about pH or special ingredients; getting the air-to-moisture balance right is what matters.
For the full picture on what makes up a good mix, see our guide to the main types of soil and potting media — it explains why each ingredient above behaves the way it does.
What goes wrong with the wrong mix
The wrong soil is one of the most common reasons black gold goldfish plant struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates black gold goldfish plant's roots.
- A pure peat mix that dries to a hard, water-repelling block is hard to re-wet and stresses the plant.
- No drainage hole turns even a good mix into a stagnant, root-rotting sump.
Reusing tired, compacted old compost or skipping the perlite. A free-draining mix in a pot with a hole solves most "why is it struggling" cases for black gold goldfish plant.
pH — does it matter for black gold goldfish plant?
Black Gold Goldfish Plant is not fussy about pH — a slightly acidic to neutral mix (around pH 6.0-7.0), which a standard peat-free compost provides, is perfectly fine. No testing needed.
If you want to check or adjust it, the soil pH guide walks through testing and the safe ways to nudge a mix more acidic or more alkaline.
DIY mix vs a bagged one
A decent bagged houseplant compost works for black gold goldfish plant as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
Drainage and the pot
A pot with a drainage hole and a saucer you empty after watering is all black gold goldfish plant needs — the free-draining mix does the rest.
Refresh black gold goldfish plant's mix every 18-24 months; even good compost slumps and compacts, and fresh, airy mix is often the simplest fix for a tired plant. When the time comes, our repotting guide for black gold goldfish plant covers the timing and technique step by step.
Black Gold Goldfish Plant soil — frequently asked questions
What is the best soil mix for black gold goldfish plant?
3 parts peat-free houseplant compost : 1 part perlite : 1 part orchid bark or coco chips (optional). Black Gold Goldfish Plant is adaptable, but like most houseplants it still needs air at the roots — a mix that drains freely while holding a working moisture reserve.
Can I use normal potting soil for black gold goldfish plant?
Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates black gold goldfish plant's roots. A decent bagged houseplant compost works for black gold goldfish plant as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
Does black gold goldfish plant need a special pH?
Black Gold Goldfish Plant is not fussy about pH — a slightly acidic to neutral mix (around pH 6.0-7.0), which a standard peat-free compost provides, is perfectly fine. No testing needed.
Should I buy a bagged mix or make my own for black gold goldfish plant?
A decent bagged houseplant compost works for black gold goldfish plant as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
How often should I refresh the soil for black gold goldfish plant?
Refresh black gold goldfish plant's mix every 18-24 months; even good compost slumps and compacts, and fresh, airy mix is often the simplest fix for a tired plant. A pot with a drainage hole and a saucer you empty after watering is all black gold goldfish plant needs — the free-draining mix does the rest.
Keep reading
- Black Gold Goldfish Plant care — the full brief (light, water, humidity, problems, pet safety)
- How often to water black gold goldfish plant — the schedule the mix feeds into
- Repotting black gold goldfish plant — when and how to refresh the mix
- Soil pH guide — test it and adjust it safely
- Should I water my plant? The simple check first
- Overwatered plant — signs and recovery
- Root rot — how the wrong soil starts it, and how to save the plant
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- All 8452 soil and potting-mix guides in the Growli library