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Plant care

Brazilian Jasmine (Dipladenia) care

Mandevilla sanderi

Also called Brazilian Jasmine, Dipladenia.

RHS H1cUSDA 10-11Mildly toxic to petsIndoor Typically 0.5-1.5 m (1.5-5 ft) tall and wide as a mounding/trailing plant in containers

Watering rhythm

4-7days

Let the top 2-3 cm of soil dry, then water; roughly every 4-7 days, more often in heat

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Light

Direct sun (at least 4-6 hours)

Soil

Well-drained, gritty potting mix

Humidity

40-60%

Temp

18-29°C

Pet safety

Mildly toxic to pets

Mature size

Typically 0.5-1.5 m (1.5-5 ft) tall and wide as a mounding/trailing plant in containers

Care at a glance

Light

Brazilian Jasmine needs sun on the leaves, not just bright ambient room light. Flowers best in full sun with at least 6 hours of direct light; tolerates bright partial shade. In intense heat some afternoon shade helps. Too little light gives leggy growth and sparse blooms; indoors give the brightest spot available. A south or west-facing windowsill in the northern hemisphere is the default; anywhere else, expect the plant to stretch and pale out within a season.

Watering

Water brazilian jasmine let the top 2-3 cm of soil dry, then water; roughly every 4-7 days, more often in heat. 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. More drought-tolerant than climbing mandevillas; prefers to dry slightly between waterings and resents soggy roots. Containers in sun need more frequent water in hot spells. Cut back watering sharply in winter when overwintered cool and semi-dormant.

Soil and pot

Brazilian Jasmine grows best in well-drained, gritty potting mix. Use a free-draining mix with added perlite, grit or sand; slightly acidic to neutral pH. Sharp drainage is essential, as this plant is prone to root rot in heavy or waterlogged soil. Moderate organic matter supports its long 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

Brazilian Jasmine sits happiest at around 40-60% humidity and 18-29°C (65-85°F). Tolerant of average to moderately humid conditions and copes with drier air better than climbing mandevillas. Outdoors in summer it is content with ambient humidity; indoors, keep it from very dry heat where spider mites can take hold. 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 brazilian jasmine sparingly. Feed every 2 weeks in spring and summer with a high-potash or flowering fertiliser to keep blooms coming. Avoid heavy nitrogen, which favours foliage over flowers. Stop feeding in autumn and through winter while the plant rests in cool, frost-free storage. 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 brazilian jasmine in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Root rot from overwatering — Its top cause of decline; soggy mix rots the roots and yellows leaves. Use a gritty, free-draining mix, let the surface dry between waterings, and never leave it sitting in water.
  • Cold sensitivity — Frost-tender and damaged below about 10°C. Move it indoors before autumn cold and overwinter frost-free; in spring cut back and resume feeding as growth restarts.
  • Sparse blooms — Too little light or excess nitrogen limits flowering. Give full sun and a high-potash feed; deadhead and lightly trim to encourage fresh flowering shoots.
  • Spider mites and mealybugs — Dry indoor air over winter invites mites (stippling, webbing) and mealybugs (white fluff in leaf joints). Inspect regularly and treat with insecticidal soap or horticultural oil.

Propagation

Propagate from softwood or semi-ripe stem cuttings in spring or summer; use rooting hormone and root in a warm, humid, free-draining medium at 21-27°C. Wear gloves to avoid the irritant milky sap, and keep cuttings warm and sheltered from cold until well rooted. 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

Brazilian Jasmine is mildly toxic to pets. Mandevilla sanderi (dipladenia) is not individually listed by the ASPCA, so its status is uncertain; treat with caution and verify with a vet. As a dogbane-family (Apocynaceae) plant it produces a milky latex sap that can irritate skin and mucous membranes and may cause gastrointestinal upset if ingested. Keep away from pets and children. 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.

Brazilian Jasmine care — frequently asked questions

What is the common name for Mandevilla sanderi?

Mandevilla sanderi is most commonly called Brazilian Jasmine, but it is also known as Brazilian Jasmine, Dipladenia. The names refer to the same species, so care instructions for Brazilian Jasmine apply identically to anything sold as Dipladenia.

How much light does brazilian jasmine need?

Brazilian Jasmine grows best in direct sun (at least 4-6 hours). Flowers best in full sun with at least 6 hours of direct light; tolerates bright partial shade. In intense heat some afternoon shade helps. Too little light gives leggy growth and sparse blooms; indoors give the brightest spot available.

How often should I water brazilian jasmine?

Water brazilian jasmine let the top 2-3 cm of soil dry, then water; roughly every 4-7 days, more often in heat. More drought-tolerant than climbing mandevillas; prefers to dry slightly between waterings and resents soggy roots. Containers in sun need more frequent water in hot spells. Cut back watering sharply in winter when overwintered cool and semi-dormant. 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 brazilian jasmine toxic to cats and dogs?

Brazilian Jasmine is mildly toxic to pets. Mandevilla sanderi (dipladenia) is not individually listed by the ASPCA, so its status is uncertain; treat with caution and verify with a vet. As a dogbane-family (Apocynaceae) plant it produces a milky latex sap that can irritate skin and mucous membranes and may cause gastrointestinal upset if ingested. Keep away from pets and children.

What USDA hardiness zone does brazilian jasmine grow in?

Brazilian Jasmine is rated for USDA zone 10-11 (tender; container/annual elsewhere) and RHS hardiness H1c. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Brazilian Jasmine deep-dive guides

Every aspect of brazilian jasmine care, each with its own calibrated guide:

Featured in these plant shortlists

Brazilian Jasmine 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

Brazilian Jasmine is also commonly called Brazilian Jasmine or Dipladenia.