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Plant care

Satomi Dogwood (Satomi Japanese Dogwood) care

Cornus kousa 'Satomi'

Also called Satomi Dogwood, Satomi Japanese Dogwood, Pink Kousa Dogwood.

RHS H6USDA 5-8Mildly toxic to petsIndoor 5–7 m tall (16–23 ft)

Watering rhythm

2weeks

Weekly during the growing season; every 2 weeks once fully established

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Light

Bright indirect light (just back from a sunny window)

Soil

Moist, acidic, well-drained loam or sandy loam

Humidity

Moderate

Temp

-23 to 35°C

Pet safety

Mildly toxic to pets

Mature size

5–7 m tall (16–23 ft)

Care at a glance

Light

In the wild satomi dogwood grows on the bright edge of a forest canopy, not in the canopy and not in the open. Indoors, that translates to within a metre of an unobstructed window, sheer curtain optional. Full sun to light dappled shade. Full sun maximises flower bract colour intensity. In USDA zones 7–8, afternoon shade prevents premature bract fade. Avoid dense shade, which drastically reduces flowering. The fastest test: a hand held at the leaf casts a soft-edged shadow at noon — sharp shadow means too much sun, no shadow means too little light.

Watering

Aim for weekly during the growing season; every 2 weeks once fully established for satomi dogwood, 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. Needs consistent moisture during flowering and summer heat. Mulch with 5–8 cm of bark chips to conserve moisture. Avoid waterlogging; established plants show moderate drought tolerance.

Soil and pot

Satomi Dogwood grows best in moist, acidic, well-drained loam or sandy loam. pH 5.5–6.5 ideal. Rich, humus-amended soil with sharp drainage gives best results. Slightly more tolerant of varying pH than C. florida but still performs poorly on chalk or heavy alkaline soils. 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

Satomi Dogwood sits happiest at around Moderate humidity and -23 to 35°C (-10 to 95°F). Tolerates typical outdoor humidity across USDA zones 5–8. Good air circulation around the canopy minimises fungal leaf issues. Humidity does not require active management in garden settings. If you keep the room above 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 satomi dogwood sparingly. Feed with a slow-release balanced or ericaceous fertiliser in spring as growth begins. Avoid excessive nitrogen. Annual mulching with well-rotted leaf mould or compost supports long-term vigour and enhances bract colour. 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 satomi dogwood in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Bract colour fading — Bracts fade from rose-pink to white prematurely in intense afternoon heat or alkaline soil. Ensure acidic soil pH and provide some afternoon shade in warmer regions; avoid excess nitrogen fertiliser.
  • Root rot in wet soils — Prolonged waterlogging causes Phytophthora root rot. Plant on a slight elevation or add grit to improve drainage. Choose a well-drained site; never plant in a frost pocket where water pools.
  • Spot anthracnose (Elsinoe corni) — Purple-bordered leaf spots in wet summers. C. kousa has strong natural resistance to Discula anthracnose but is susceptible to spot anthracnose. Rake fallen leaves and improve air flow to reduce infection.

Propagation

Semi-hardwood cuttings in mid to late summer using IBA rooting powder and mist propagation. Grafting onto C. kousa seedling rootstock is standard for commercial production to ensure vigour. Seed does not come true to colour. 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

Satomi Dogwood is mildly toxic to pets. ASPCA lists Cornus species as non-toxic to cats and dogs. However, the ornamental fruits of C. kousa 'Satomi' may cause mild gastrointestinal upset if consumed in large quantities by pets or children. The species is broadly considered low-hazard. 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.

Satomi Dogwood care — frequently asked questions

What is the common name for Cornus kousa 'Satomi'?

Cornus kousa 'Satomi' is most commonly called Satomi Dogwood, but it is also known as Satomi Dogwood, Satomi Japanese Dogwood, Pink Kousa Dogwood. The names refer to the same species, so care instructions for Satomi Dogwood apply identically to anything sold as Satomi Japanese Dogwood.

How much light does satomi dogwood need?

Satomi Dogwood grows best in bright indirect light (just back from a sunny window). Full sun to light dappled shade. Full sun maximises flower bract colour intensity. In USDA zones 7–8, afternoon shade prevents premature bract fade. Avoid dense shade, which drastically reduces flowering.

How often should I water satomi dogwood?

Water satomi dogwood weekly during the growing season; every 2 weeks once fully established. Needs consistent moisture during flowering and summer heat. Mulch with 5–8 cm of bark chips to conserve moisture. Avoid waterlogging; established plants show moderate drought tolerance. 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 satomi dogwood toxic to cats and dogs?

Satomi Dogwood is mildly toxic to pets. ASPCA lists Cornus species as non-toxic to cats and dogs. However, the ornamental fruits of C. kousa 'Satomi' may cause mild gastrointestinal upset if consumed in large quantities by pets or children. The species is broadly considered low-hazard.

What USDA hardiness zone does satomi dogwood grow in?

Satomi Dogwood is rated for USDA zone 5-8 and RHS hardiness H6. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Satomi Dogwood deep-dive guides

Every aspect of satomi dogwood care, each with its own calibrated guide:

Featured in these plant shortlists

Satomi Dogwood qualifies for 4 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Satomi Dogwood is also known as Satomi Dogwood, Satomi Japanese Dogwood, and Pink Kousa Dogwood.