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Watermelon Dischidia

Dischidia ovata, Apocynaceae

Sources last read 13 September 2026.

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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. NC State Extension 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 Shade
NC State Extension · read 13 September 2026
Water
Good Drainage, Moist
NC State Extension · 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
Soil
Loam (Silt), Sand; pH Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0)
NC State Extension · 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 record of poisoning in people is listed for this plant; that absence is not evidence it is safe.
NC State Extension · read 13 September 2026

Routine care

Watering
Watermelon Dischidia is an epiphytic, climbing herbaceous perennial belonging to the dogbane family (Apocynaceae). The common name comes from its likeness to watermelon rind.
NC State Extension · read 13 September 2026
Repotting
Repot about every 2 to 3 years, and sooner if it gets too big for its pot.
NC State Extension · read 13 September 2026
Propagation
Stem cuttings are the simplest way to propagate it.
NC State Extension · read 13 September 2026

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About the plant

Dischidia ovata, commonly called watermelon dischidia, is a small vine in the frangipani and hoya family Apocynaceae, native to New Guinea and Cape York Peninsula, Australia. The species name ovata refers to its ovate leaves, its common name refers to the leaf venation that resembles a watermelon rind. The species is succulent and grows as an epiphytic or lithophytic vine in a variety of habitats.

From Wikipedia, CC BY-SA 4.0 · read 13 September 2026

Native range
New Guinea to N. Queensland
World Checklist of Vascular Plants, June 2026 release, CC BY.
Kew WCVP · read 13 September 2026
New Guinea to North Queensland
NC State Extension · read 13 September 2026
Climate
wet tropical
World Checklist of Vascular Plants, June 2026 release, CC BY.
Kew WCVP · read 13 September 2026
Growth form
climbing epiphyte or lithophyte
World Checklist of Vascular Plants, June 2026 release, CC BY.
Kew WCVP · read 13 September 2026
Epiphyte, Herbaceous Perennial, Perennial, Vine; habit cascading, climbing
NC State Extension · read 13 September 2026
Size
Height 2–3 in; width 24–36 in
NC State Extension · read 13 September 2026
Flowering
Flowers cream/tan, white
NC State Extension · read 13 September 2026

More of the Apocynaceae family

Plants with similar care

Sources

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.