Fertilising guide
How to fertilise Palo Santo (Bursera graveolens)— schedule & NPK
Also called Palo Santo, Holy Wood, Sacred Wood.
More about palo santo
About Palo Santo
Bursera graveolens · also called Palo Santo, Holy Wood · tropical
Palo Santo is a resinous succulent tree from Ecuador and Peru prized for its fragrant wood. As a caudiciform houseplant it demands bright direct sun, extremely fast-draining soil, and a strict dry winter dormancy. Water sparingly in summer and almost not at all in winter. Frost-tender; best kept above 10 °C (50 °F) year-round.
Growth habit: Deciduous caudiciform tree or large shrub; develops a swollen, resin-filled trunk with papery peeling bark and small pinnate leaves that drop in winter dormancy.
What fertiliser palo santo actually wants — and why
Palo Santo is a light-feeding succulent — a gentle, low-nitrogen feed a few times in growth keeps it plump without forcing the weak, stretched growth over-feeding causes.
A cactus and succulent formula or a diluted balanced feed with modest, even numbers. Avoid high-nitrogen plant foods — they make a succulent etiolate and grow soft, fracture-prone tissue.
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 palo santo: 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 palo santo, 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 palo santo:
Feed once a month during the active growing season (spring–summer) with a dilute, low-nitrogen, high-potassium cactus fertiliser (e.g. 5-10-10 at half strength). Do not feed during dormancy. Keep that to once a month between spring through early autumn (roughly March to September) and stop entirely once growth slows for winter.
The dormant-season rule matters more than the exact interval: skip feeding entirely when palo santo 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 palo santo
Quarter to half strength at most for palo santo. Succulents take up very little, and a strong dose burns the fine roots before the plant can use it.
Feeding always goes onto already-damp soil, never dry roots — water palo santo first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the palo santo watering schedule.
Signs you are over-feeding palo santo
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for palo santo:
- Stretched, leggy, pale growth with widely spaced leaves.
- A white salt crust on the soil or around the pot rim.
- Brown, crisped leaf tips and edges.
- Soft, mushy tissue at the base — over-feeding plus damp soil rots it.
Signs you are under-feeding palo santo
- Uncommon — succulents tolerate lean conditions well.
- Very slow growth and dull, faded colour over a long period.
- Older leaves shed faster than new ones replace them in a tired old mix.
If the symptoms point at watering, light or roots rather than nutrition, the full palo santo care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Feed lightly enough and you rarely need to flush, but once a year run plain water through the pot of palo santo until it drains clear, and refresh the gritty mix every 2-3 years.
Organic vs synthetic feeds for palo santo
Organic options
A heavily diluted seaweed or worm-casting feed once or twice in summer. UK: a drop of Westland seaweed feed; US: quarter-strength Espoma Cactus! or Dr. Earth liquid. Fresh free-draining mix matters more than any feed.
Synthetic / liquid feeds
A dedicated cactus/succulent liquid at quarter to half strength — UK: Baby Bio Cacti & Succulent Drip Feeders or Westland; US: Miracle-Gro Succulent Plant Food or Schultz Cactus Plus.
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 palo santo — frequently asked questions
What fertiliser does palo santo need?
A cactus and succulent formula or a diluted balanced feed with modest, even numbers. Avoid high-nitrogen plant foods — they make a succulent etiolate and grow soft, fracture-prone tissue. Palo Santo is a light-feeding succulent — a gentle, low-nitrogen feed a few times in growth keeps it plump without forcing the weak, stretched growth over-feeding causes.
How often should I feed palo santo?
Feed once a month during the active growing season (spring–summer) with a dilute, low-nitrogen, high-potassium cactus fertiliser (e.g. 5-10-10 at half strength). Do not feed during dormancy. Feed once a month during the active growing season (spring–summer) with a dilute, low-nitrogen, high-potassium cactus fertiliser (e.g. 5-10-10 at half strength). Do not feed during dormancy. Keep that to once a month between spring through early autumn (roughly March to September) and stop entirely once growth slows for winter.
What strength of feed for palo santo?
Quarter to half strength at most for palo santo. Succulents take up very little, and a strong dose burns the fine roots before the plant can use it.
What does over-feeding palo santo look like?
Stretched, leggy, pale growth with widely spaced leaves. A white salt crust on the soil or around the pot rim. Brown, crisped leaf tips and edges. Soft, mushy tissue at the base — over-feeding plus damp soil rots it. Feeding palo santo like a leafy houseplant is the classic error — it produces a flush of pale, stretched, floppy growth that never firms up and is prone to rot at the base.
Should I flush the soil of palo santo?
Feed lightly enough and you rarely need to flush, but once a year run plain water through the pot of palo santo until it drains clear, and refresh the gritty mix every 2-3 years.
Keep reading
- Palo Santo care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water palo santo — 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 hooker's anchomanes
- How to fertilise johnston's cyrtosperma
- How to fertilise lesser theriophonum
- All 8452 fertilising guides in the Growli library