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Plant care

Lawes' Dendrobium (Lawes' Cane Orchid) care

Dendrobium lawesii

Also called Lawes' Cane Orchid.

RHS H1AUSDA 11-12Pet-safeIndoor Canes 30-60 cm long

Watering rhythm

2-4days

Freely in the growing season (every 2-4 days); reduce to very minimal in the dry winter rest

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Light

Bright indirect light (just back from a sunny window)

Soil

Coarse bark in a slatted wooden hanging basket

Humidity

60-80%

Temp

18-30°C

Pet safety

Pet-safe

Mature size

Canes 30-60 cm long

Care at a glance

Light

Lawes' Dendrobium is what florists mean by "bright spot, no direct sun" — close enough to a south or east window to feel the brightness, with a sheer curtain or a few feet of distance keeping the sun off the leaves. Needs bright indirect light — 2,500-4,000 lux. Position in a bright east- or west-facing window or in a warm glasshouse with light shade. Good light supports cane development; too little leads to thin, poorly developed canes that do not flower. A phone lux-meter at the leaf surface should read 1,500-3,000 lux at noon.

Watering

Water lawes' dendrobium freely in the growing season (every 2-4 days); reduce to very minimal in the dry winter rest. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Water generously from spring through summer with soft or rainwater, flushing through fully. In autumn, progressively reduce and keep almost dry for 6-8 weeks to induce flowering. Resume watering once buds emerge. Hanging baskets dry faster and suit this species well.

Soil and pot

Lawes' Dendrobium grows best in coarse bark in a slatted wooden hanging basket. A hanging slatted basket filled with coarse orchid bark allows the pendulous canes to drape freely. The open basket also dries quickly, supporting the essential winter dry rest. Repot every 2-3 years after flowering. 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

Lawes' Dendrobium sits happiest at around 60-80% humidity and 18-30°C (64-86°F). Moderate to high humidity is preferred during the growing season. Drop humidity slightly during the winter dry rest to match conditions in its natural monsoon habitat. Consistent airflow prevents fungal issues on the long canes. If you keep the room above 18 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 lawes' dendrobium sparingly. Feed with a balanced orchid fertiliser at half strength every 2 weeks during active growth. Transition to a high-potassium feed in late summer to mature canes. Stop feeding during the winter rest. 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 lawes' dendrobium in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Failure to flower — Skipping the dry winter rest is the most common cause. Ensure a firm 6-8 week rest with minimal watering and cooler nights.
  • Soft or rotting canes — Caused by overwatering or excessive wetness during cool periods. Improve drainage and reduce water frequency; remove any blackened sections with a sterile blade.
  • Spider mites in dry conditions — Thrive when humidity drops in centrally heated rooms. Maintain humidity above 60% and treat with insecticidal soap if found on leaf undersides.
  • Keikis replacing flowers — High nitrogen fertiliser or warm nights during the rest can trigger keikis. Adjust feeding and allow a genuine cool night temperature drop.
  • Scale insects on canes — Hard brown bumps on cane surfaces. Treat with horticultural oil and remove manually; repeat treatment over 4 weeks.

Companion plants

Lawes' Dendrobium pairs well with Dendrobium bracteosum, Dendrobium vexillarius, Bulbophyllum macranthum, and Coelogyne pandurata. These are species with similar light and water needs, so you can group them in the same room or on the same shelf and water as a batch.

Propagation

Detach well-rooted keikis once roots reach 2-3 cm and pot into fine bark. Division is an option when canes become very crowded, ensuring each section retains at least 3 canes with visible healthy roots. 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

Lawes' Dendrobium is pet-safe. Dendrobium lawesii belongs to Orchidaceae, a family listed as non-toxic to cats and dogs by the ASPCA. This species is safe in households with pets. 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.

Lawes' Dendrobium care — frequently asked questions

What is the common name for Dendrobium lawesii?

Dendrobium lawesii is most commonly called Lawes' Dendrobium, but it is also known as Lawes' Cane Orchid. The names refer to the same species, so care instructions for Lawes' Dendrobium apply identically to anything sold as Lawes' Cane Orchid.

How much light does lawes' dendrobium need?

Lawes' Dendrobium grows best in bright indirect light (just back from a sunny window). Needs bright indirect light — 2,500-4,000 lux. Position in a bright east- or west-facing window or in a warm glasshouse with light shade. Good light supports cane development; too little leads to thin, poorly developed canes that do not flower.

How often should I water lawes' dendrobium?

Water lawes' dendrobium freely in the growing season (every 2-4 days); reduce to very minimal in the dry winter rest. Water generously from spring through summer with soft or rainwater, flushing through fully. In autumn, progressively reduce and keep almost dry for 6-8 weeks to induce flowering. Resume watering once buds emerge. Hanging baskets dry faster and suit this species well. 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 lawes' dendrobium toxic to cats and dogs?

Lawes' Dendrobium is pet-safe. Dendrobium lawesii belongs to Orchidaceae, a family listed as non-toxic to cats and dogs by the ASPCA. This species is safe in households with pets.

What USDA hardiness zone does lawes' dendrobium grow in?

Lawes' Dendrobium is rated for USDA zone 11-12 (indoor only) and RHS hardiness H1A. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Lawes' Dendrobium deep-dive guides

Every aspect of lawes' dendrobium care, each with its own calibrated guide:

Featured in these plant shortlists

Lawes' Dendrobium qualifies for 8 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Lawes' Dendrobium is also commonly called Lawes' Cane Orchid.