Dendrobium orchid
Sources last read 14 September 2026.
Difficult One of the harder ones, and one of the reasons the diagnosis tool exists.
Also called noble rock orchid.
Toxicity is partly unassessed
- Not assessed for cats. This plant is not on the ASPCA list. That is not a finding of safety: none of the sources read for this site gives an answer either way. Treat it as unknown.
- Not assessed for dogs. This plant is not on the ASPCA list. That is not a finding of safety: none of the sources read for this site gives an answer either way. Treat it as unknown.
- Not assessed for people. RHS publishes no harm statement for this plant. That is not a finding of safety: none of the sources read for this site gives an answer either way. Treat it as unknown.
What the sources say about its care
- Light
- Partial shadeRHS · read 13 September 2026
- Water
- Well-drainedRHS · read 13 September 2026
- Humidity
No source read publishes a humidity figure for any plant on this site. What follows is general guidance for foliage plants.
ASHRAE recommends indoor relative humidity between 30% and 60% 30–60%Penn State Extension · read 13 September 2026- Temperature
How cold this tolerates, not what it prefers. No source read for this site publishes a preferred range for a plant indoors.
H1C — 5–10°C 5–10 °CRHS · read 13 September 2026- Soil
- Loam; pH Acid or NeutralRHS · read 13 September 2026
- Toxic to cats
- Not on the ASPCA list. That is not a finding of safety.ASPCA · read 13 September 2026
- Toxic to dogs
- Not on the ASPCA list. That is not a finding of safety.ASPCA · read 13 September 2026
- Harmful to people
- No statement of harm to people is published for this plant; that absence is not evidence it is safe.RHS · read 13 September 2026
How it usually goes wrong
- A thin dry rim that crumbles between the fingers
The dendrobium orchid browns at the very tips first, and the brown line creeps back along the edges over weeks. The tissue is dry and brittle, not soft.
Penn State Extension notes that most indoor plants benefit from more humidity than a home heated in winter provides. The leaf edge, furthest from the veins, is where the shortfall shows.
Telling it apart: Look at the pot rim and the soil surface. A white crust points at a build-up from tap water or feed rather than at the air. Penn State also reports misting and pebble trays do little to the humidity around a plant.
Penn State ExtensionDendrobium orchid leggy, leaning growth: causes- Leaves but no flowers
The dendrobium orchid flowered well at first, then less each season, while its leaves stayed healthy and new stems grew longer.
Its source places it in partial shade. Flowers cost more than leaves, and a plant kept darker than that keeps growing leaves while it builds few buds or none.
Telling it apart: The rest of the plant. A healthy, leafy plant without flowers is short of light or of a season it needs; a plant that is also yellowing has a root or water problem first.
RHSDendrobium orchid not flowering or dropping buds: causes- The plant deflates, and lifts again within hours of a soak
The plant droops as a whole rather than losing particular leaves, and the soil surface has gone pale and hard.
Water held in the cells keeps a leaf rigid. With the compost dry beyond what its source describes as well-drained, that water is used and not replaced.
Telling it apart: Whether the soil has pulled from the pot wall. That gap is the mark of soil taken properly dry.
RHSDiagnose drooping on this Dendrobium orchid- The plant grows thin and sparse, and leans
Growth on the side of the dendrobium orchid away from the light slows or stops, so the plant becomes lopsided over a few months.
Its source puts it in partial shade. Under that, each new leaf costs more than it returns, so the plant builds fewer and thinner ones.
Telling it apart: Turn the pot and wait a fortnight. New growth that swings back toward the window is answering a light question.
RHSDendrobium orchid leggy, leaning growth: causes
Not sure which it is? Ask the diagnosis questions for Dendrobium orchid.
Routine care
- Watering
- Use epiphytic orchid compost. From late spring through summer, keep in partial shade with good airflow, daytime temperatures of 18-25°C and nights above 10°C; water generously, add orchid fertiliser at every third watering, and mist twice a day for high humidity.RHS · read 13 September 2026
- Feeding
- Use an epiphytic orchid compost. From late spring to summer keep in partial shade with good airflow, at 18-25°C by day and above 10°C at night; water generously, add orchid fertiliser at every third watering, and mist twice a day for high humidity.RHS · read 13 September 2026
- Propagation
- Divide once the plant fills its pot too full.RHS · read 13 September 2026
- Pruning
- Pruning is not needed; remove flowered stems when required.RHS · read 13 September 2026
- Pests and diseases
- Can be troubled by mealybugs, glasshouse red spider mite and aphids. Diseases: usually none.RHS · read 13 September 2026
Move something and watch
Loading the simulator. It needs JavaScript; the care table above does not.
Photographs
About the plant
Dendrobium nobile, also known as the noble dendrobium, is a member of the family Orchidaceae. It is one of the most widespread ornamental members of the orchid family. It is the state flower of the Indian state of Sikkim.
From Wikipedia, CC BY-SA 4.0 · read 13 September 2026
- Native range
- Nepal to S. China and Indo-ChinaWorld Checklist of Vascular Plants, June 2026 release, CC BY.Kew WCVP · read 13 September 2026S & SE AsiaRHS · read 13 September 2026
- Climate
- subtropicalWorld Checklist of Vascular Plants, June 2026 release, CC BY.Kew WCVP · read 13 September 2026
- Growth form
- pseudobulbous epiphyte or lithophyteWorld Checklist of Vascular Plants, June 2026 release, CC BY.Kew WCVP · read 13 September 2026Columnar upright (semi evergreen)RHS · read 13 September 2026
- Size
- Height 0.1-0.5 metres; spread 0.1-0.5 metres after 2–5 yearsRHS · read 13 September 2026
- Flowering
- Flowers pink in spring and winterRHS · read 13 September 2026
Common problems with Dendrobium orchid
Other Dendrobium
More of the Orchidaceae family
Moth orchidCrisp margins that appear in winter
Christmas OrchidSourced care, difficulty not yet judged
Cocktail OrchidSourced care, difficulty not yet judged
Crimson CattleyaSourced care, difficulty not yet judged
Crucifix OrchidSourced care, difficulty not yet judged
Curled OdontoglossumSourced care, difficulty not yet judged
Plants with similar care
Barberton daisyEdges of the leaves brown while the middle stays sound
Florist's cyclamenBuds that yellow and drop on a leafy plant
GardeniaBuds form and fall before they open
Indian azaleaDry, bruised edges after a cold, windy spell
- No photograph yetZebra plantBrown, papery patches on the leaves nearest the glass
Sources
- ASPCA · read 13 September 2026
- Kew WCVP · read 13 September 2026
- Penn State Extension · read 13 September 2026
- RHS · read 13 September 2026
- Wikipedia · read 13 September 2026
What this does not cover
The figures above are what published sources say, not measurements of the plant in your room. They say nothing about your pot size, your water, the season, or how far from the glass the plant stands, and those decide more than any figure here does.
Humidity has no species figure because no source read for this site publishes one, and the only temperature published for this plant is a cold floor. The simulator fills those gaps with general figures for its kind of plant, marked as general and listed on how we read sources. Where a toxicity row says the plant was not assessed, that is the absence of a finding and not a finding of safety.
If something is already wrong, the diagnosis tool asks about the soil, the window and the watering, which is where the answer usually is.