Fertilising guide
How to fertilise Durian (Durio zibethinus)— schedule & NPK
Also called Durian, King of fruits.
More about durian
About Durian
Durio zibethinus · also called Durian, King of fruits · tropical
Durian (Durio zibethinus) is a large tropical rainforest tree from Southeast Asia, famed for huge, spiny fruit with custard-like, pungent flesh dubbed the 'king of fruits'. It demands hot, wet, humid lowland conditions, deep fertile soil and many years to bear. Grafted trees fruit in four to six years; seedlings take far longer.
Growth habit: Large, fast-growing evergreen tree with a tall, buttressed trunk and a spreading crown of glossy leaves; cauliflorous flowers and the massive spiny fruit emerge directly from trunk and major branches.
Watch for — Strict climate requirement: Durian fails outside hot, humid, frost-free lowlands; cool spells, drought or low humidity stunt growth and prevent cropping.
What fertiliser durian actually wants — and why
Durian is a genuinely hungry tropical — in bright warmth it pushes growth fast and rewards a regular half-strength balanced feed all season.
A balanced liquid feed (even N-P-K) or a slightly nitrogen-leaning foliage feed — this is a big-leaved foliage plant putting on real size, so it wants steady nitrogen for lush leaves, not a bloom 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 durian: 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 durian, 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 durian:
Feed regularly through the warm season with a balanced fertiliser, shifting to higher potassium and phosphorus before flowering and fruiting. Mulch heavily with organic matter; durian is a heavy feeder and responds to consistent, well-balanced nutrition. For a fast grower like this that means feeding regularly — about sparingly through the growing season — right through spring through early autumn (roughly March to September), tapering off only as light drops in autumn.
The dormant-season rule matters more than the exact interval: skip feeding entirely when durian 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 durian
Half strength every feed is the sweet spot for durian: frequent enough to fuel fast growth, dilute enough that it never scorches even when you feed often.
Feeding always goes onto already-damp soil, never dry roots — water durian first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the durian watering schedule.
Signs you are over-feeding durian
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for durian:
- Brown, scorched leaf tips and margins despite correct watering.
- A white salt crust on the soil or around the pot edge.
- Sudden leaf yellowing and drop shortly after a strong feed.
- Soft, weak, over-stretched growth that cannot support itself.
Signs you are under-feeding durian
- New leaves coming in noticeably smaller than older ones.
- Pale, yellow-green older leaves and slow growth through peak summer.
- A general loss of vigour and gloss in a plant that should be racing away.
If the symptoms point at watering, light or roots rather than nutrition, the full durian care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Because you feed often, salts accumulate faster — flush the pot of durian with plain water until it drains freely roughly every month through the feeding season to keep the root zone clean.
Organic vs synthetic feeds for durian
Organic options
A diluted seaweed or fish-and-seaweed feed plus a yearly top-dress of worm castings supports fast growth without burn risk. UK: Westland seaweed or Baby Bio Organic; US: Neptune's Harvest or Espoma Indoor!.
Synthetic / liquid feeds
A balanced houseplant liquid at half strength applied frequently — UK: Baby Bio, Phostrogen or Westland Houseplant Feed; US: Miracle-Gro Indoor Plant Food or Dyna-Gro Foliage-Pro for steady leafy growth.
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 durian — frequently asked questions
What fertiliser does durian need?
A balanced liquid feed (even N-P-K) or a slightly nitrogen-leaning foliage feed — this is a big-leaved foliage plant putting on real size, so it wants steady nitrogen for lush leaves, not a bloom formula. Durian is a genuinely hungry tropical — in bright warmth it pushes growth fast and rewards a regular half-strength balanced feed all season.
How often should I feed durian?
Feed regularly through the warm season with a balanced fertiliser, shifting to higher potassium and phosphorus before flowering and fruiting. Mulch heavily with organic matter; durian is a heavy feeder and responds to consistent, well-balanced nutrition. Feed regularly through the warm season with a balanced fertiliser, shifting to higher potassium and phosphorus before flowering and fruiting. Mulch heavily with organic matter; durian is a heavy feeder and responds to consistent, well-balanced nutrition. For a fast grower like this that means feeding regularly — about sparingly through the growing season — right through spring through early autumn (roughly March to September), tapering off only as light drops in autumn.
What strength of feed for durian?
Half strength every feed is the sweet spot for durian: frequent enough to fuel fast growth, dilute enough that it never scorches even when you feed often.
What does over-feeding durian look like?
Brown, scorched leaf tips and margins despite correct watering. A white salt crust on the soil or around the pot edge. Sudden leaf yellowing and drop shortly after a strong feed. Soft, weak, over-stretched growth that cannot support itself. The mistake here is the opposite of most houseplants: under-feeding a fast tropical in peak season starves it, leaving small, pale new leaves and slow growth — but full-strength doses still burn it, so feed often and weak, not occasionally and strong.
Should I flush the soil of durian?
Because you feed often, salts accumulate faster — flush the pot of durian with plain water until it drains freely roughly every month through the feeding season to keep the root zone clean.
Keep reading
- Durian care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water durian — 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 monstera
- How to fertilise pothos
- How to fertilise fiddle leaf fig
- All 5561 fertilising guides in the Growli library