Fertilising guide
How to fertilise Elephant bush (Portulacaria afra)— schedule & NPK
Also called Elephant bush, Elephant's food, Porkbush, Dwarf jade, Spekboom.
More about elephant bush
About Elephant bush
Portulacaria afra · also called Elephant bush, Elephant's food · houseplant
Elephant bush (Portulacaria afra) is an easy-going South African succulent shrub with glossy, coin-sized leaves on red-brown stems, often grown as an indoor mini-tree or bonsai. Its one defining need is sharp drainage: plant it in gritty cactus compost and let the soil dry between waterings, because soggy roots rot it fast.
Growth habit: A multi-stemmed, soft-wooded evergreen shrub with reddish-brown stems that grey with age and small, fleshy, rounded leaves arranged in opposite pairs. Naturally bushy and easily shaped, it is a popular subject for bonsai and trailing pot displays, and responds well to pinching and pruning.
Watch for — Leggy, stretched growth: In too little light the stems elongate, lean toward the window and leaves become sparse and pale. Move to a brighter spot and pinch the tips to encourage bushier, more compact growth.
What fertiliser elephant bush actually wants — and why
Elephant bush 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 elephant bush: 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 elephant bush, 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 elephant bush:
Feed lightly during the growing season, from spring to early autumn, using a balanced or cactus-formula feed diluted to about half strength roughly once a month. It is a slow, frugal grower that needs little feeding, so err on the side of under-feeding. Stop feeding entirely in winter while growth is paused. Treat that as once a month 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 elephant bush 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 elephant bush
Half strength is the safe default for elephant bush — 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 elephant bush first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the elephant bush watering schedule.
Signs you are over-feeding elephant bush
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for elephant bush:
- 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 elephant bush
- 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 elephant bush care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of elephant bush 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 elephant bush
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 elephant bush — frequently asked questions
What fertiliser does elephant bush 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. Elephant bush 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 elephant bush?
Feed lightly during the growing season, from spring to early autumn, using a balanced or cactus-formula feed diluted to about half strength roughly once a month. It is a slow, frugal grower that needs little feeding, so err on the side of under-feeding. Stop feeding entirely in winter while growth is paused. Feed lightly during the growing season, from spring to early autumn, using a balanced or cactus-formula feed diluted to about half strength roughly once a month. It is a slow, frugal grower that needs little feeding, so err on the side of under-feeding. Stop feeding entirely in winter while growth is paused. Treat that as once a month 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 elephant bush?
Half strength is the safe default for elephant bush — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding elephant bush 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 elephant bush 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 elephant bush?
Flush the pot of elephant bush 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
- Elephant bush care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water elephant bush — 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 snake plant
- How to fertilise dracaena
- How to fertilise peperomia
- All 271 fertilising guides in the Growli library