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Plant care

Palo Santo (Holy Wood) care

Bursera graveolens

Also called Palo Santo, Holy Wood, Sacred Wood.

RHS H1bUSDA 10–12Mildly toxic to petsIndoor In habitat up to 8 m tall

Watering rhythm

2-4weeks

Every 2–4 weeks in summer; monthly or less in winter

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Light

Direct sun (at least 4-6 hours)

Soil

Very fast-draining cactus/succulent mix with added inorganic grit

Humidity

20–40%

Temp

15–35 °C

Pet safety

Mildly toxic to pets

Mature size

In habitat up to 8 m tall

Care at a glance

Light

Most houseplants will scorch where palo santo thrives. Give it the windowsill you'd otherwise leave empty because everything else burned there. Requires at least 6 hours of direct sun daily. A south- or west-facing windowsill or unobstructed glasshouse position is ideal. Insufficient light causes etiolation and loss of the characteristic compact, gnarled form. A plant moved abruptly from low light to direct sun bleaches in 48 hours — always acclimatise over a week.

Watering

Aim for every 2–4 weeks in summer; monthly or less in winter for palo santo, but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Treat like a desert succulent. Water thoroughly then allow the soil to dry completely before watering again. During winter dormancy (when leafless) withhold water almost entirely — a light misting once a month at most. Overwatering is the leading cause of death.

Soil and pot

Palo Santo grows best in very fast-draining cactus/succulent mix with added inorganic grit. Use a commercial cactus mix amended 50:50 with perlite, pumice, or coarse grit. The mix must never remain moist for more than a day or two. A slightly acidic to neutral pH of 6.0–7.0 is suitable. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Palo Santo sits happiest at around 20–40% humidity and 15–35 °C (59–95 °F). Adapted to seasonally arid habitats. Standard indoor humidity is perfectly adequate; high humidity combined with wet soil accelerates root rot. Do not mist the caudex or place near humidifiers. If you keep the room above 15–35 °C year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed palo santo sparingly. 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. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on palo santo in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Root rot from overwatering — The single most common cause of loss. Soft, discoloured caudex base indicates rot. Remove from soil, cut away rotted tissue, allow to callus for several days, then replant in bone-dry gritty mix and do not water for 2–3 weeks.
  • Failure to leaf out in spring — Usually caused by keeping the plant too cold or too wet during winter dormancy. Ensure minimum 15 °C and near-dry conditions in winter; move to full sun and resume watering as temperatures rise in spring.
  • Spider mites in hot, dry conditions — Fine webbing on new growth signals infestation. Wipe leaves with a damp cloth and treat with neem oil or insecticidal soap; improve air circulation. Mites thrive when dust accumulates on leaves.

Propagation

Seed is the primary method; sow fresh seed in a gritty mix at 25–30 °C with high humidity until germination, then transition to dry conditions. Stem cuttings are possible but slow to callus and root; allow the cut end to dry for at least a week before inserting into dry gritty mix. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Palo Santo is mildly toxic to pets. Bursera graveolens is not individually listed by ASPCA as either toxic or non-toxic. Bursera sap and resins contain terpenoids and can irritate skin and mucous membranes on contact. Ingestion may cause mild gastrointestinal upset. Treat with caution around pets and children; the smoke from burning wood should be used in ventilated spaces only. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Palo Santo care — frequently asked questions

What is the common name for Bursera graveolens?

Bursera graveolens is most commonly called Palo Santo, but it is also known as Palo Santo, Holy Wood, Sacred Wood. The names refer to the same species, so care instructions for Palo Santo apply identically to anything sold as Holy Wood.

How much light does palo santo need?

Palo Santo grows best in direct sun (at least 4-6 hours). Requires at least 6 hours of direct sun daily. A south- or west-facing windowsill or unobstructed glasshouse position is ideal. Insufficient light causes etiolation and loss of the characteristic compact, gnarled form.

How often should I water palo santo?

Water palo santo every 2–4 weeks in summer; monthly or less in winter. Treat like a desert succulent. Water thoroughly then allow the soil to dry completely before watering again. During winter dormancy (when leafless) withhold water almost entirely — a light misting once a month at most. Overwatering is the leading cause of death. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is palo santo toxic to cats and dogs?

Palo Santo is mildly toxic to pets. Bursera graveolens is not individually listed by ASPCA as either toxic or non-toxic. Bursera sap and resins contain terpenoids and can irritate skin and mucous membranes on contact. Ingestion may cause mild gastrointestinal upset. Treat with caution around pets and children; the smoke from burning wood should be used in ventilated spaces only.

What USDA hardiness zone does palo santo grow in?

Palo Santo is rated for USDA zone 10–12 and RHS hardiness H1b. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Palo Santo deep-dive guides

Every aspect of palo santo care, each with its own calibrated guide:

Featured in these plant shortlists

Palo Santo qualifies for 3 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Palo Santo is also known as Palo Santo, Holy Wood, and Sacred Wood.