Dipladenia (Brazilian Jasmine) care

Light

Aim for at least 4-6 hours of direct sun on the leaves. Requires at least 6 hours of direct sun daily for abundant blooming. In very hot climates above 35°C, light afternoon shade protects blooms. Indoors, place in front of a bright south- or west-facing window. If your only bright window faces south, that's perfect for dipladenia — same window any aroid would fry on.

Watering

Watering dipladenia: once or twice weekly in summer; every 10–14 days in winter. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Check the top 5 cm of soil and water when it begins to dry. Allow soil to dry slightly between waterings — root rot is the most common cause of failure. Reduce frequency substantially in winter when the plant is semi-dormant.

Soil and pot

Dipladenia grows best in free-draining, sandy or perlite-enriched tropical mix. Use a well-draining potting mix with added coarse perlite or horticultural sand. Avoid heavy or moisture-retentive composts. A slightly acidic to neutral pH (6.0–7.0) suits this species well. 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

Dipladenia sits happiest at around 50–60% humidity and 15–30°C (59–86°F). Prefers moderate tropical humidity but is more tolerant of drier air than many tropical vines. Misting or a humidity tray helps in dry indoor environments, especially in heated rooms during winter. If you keep the room above 15–30°C 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 dipladenia sparingly. Feed every two weeks during the growing season (spring to early autumn) with a balanced liquid fertiliser, then switch to a high-potassium feed (tomato feed) in midsummer to maximise flowering. Do not feed in winter. 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 dipladenia in the Growli community. Each is annotated with the most common cause so you know where to start.

• Root rot — Caused by overwatering or poorly draining soil. Allow the growing medium to dry slightly between waterings and ensure the pot has adequate drainage holes. Remove affected roots and repot into fresh, dry mix.
• No flowers — Insufficient light is the primary cause. Move to a sunnier position with at least 6 hours of direct sun. Also check that pot is not too large (oversized containers promote root growth over blooms) and switch to a high-potassium fertiliser.
• Aphids and mealybugs — Common on new growth and in the leaf axils. Wipe off mealybugs with a cotton swab dipped in rubbing alcohol; treat aphid colonies with insecticidal soap. Inspect regularly as populations build quickly in warm, dry conditions.

Propagation

Take softwood or semi-hardwood tip cuttings (8–10 cm) in spring or early summer. Remove lower leaves, dip cut ends in rooting hormone, and insert into moist perlite. Maintain warmth (22–26°C) and humidity with a clear plastic bag or propagation cover. Roots develop in 3–5 weeks. 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

Dipladenia is mildly toxic to pets. Dipladenia sanderi is now classified within Mandevilla (family Apocynaceae). All parts contain milky sap with compounds that can cause vomiting, diarrhea, and drooling in dogs and cats if ingested. Sap may also cause contact dermatitis. Keep away from pets and children. Consult a vet if ingestion occurs. 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.

Dipladenia deep-dive guides

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

• Common dipladenia problems & fixes
• Dipladenia watering schedule
• Dipladenia light requirements
• Best soil mix for dipladenia
• Dipladenia fertilizing guide
• When to repot dipladenia
• How to propagate dipladenia
• How to prune dipladenia
• What's eating my dipladenia?
• Dipladenia growth rate & size
• Dipladenia cold hardiness
• Dipladenia temperature & humidity
• Is dipladenia toxic to cats & dogs?
• Is dipladenia toxic to cats?
• Is dipladenia toxic to dogs?

Featured in these plant shortlists

Dipladenia qualifies for 5 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best trailing & climbing houseplants — Vining and trailing houseplants for shelves, hanging pots, and moss poles — selected by growth habit.
• Best humidity-loving houseplants — Houseplants that thrive in a bathroom, kitchen, or by a humidifier — selected by documented humidity preference.
• Best houseplants for full sun — Houseplants that want direct sun — the species for a hot south or west-facing windowsill where shade-lovers scorch.
• Best fast-growing houseplants — Houseplants documented as fast or vigorous growers — quick to fill a pot, cover a pole or trail down a shelf.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Dipladenia is also known as Dipladenia, Brazilian Jasmine, and Rock Trumpet.

• Philodendron Brasil care — light, water and common problems
• Heartleaf philodendron care — light, water and common problems
• Philodendron micans care — light, water and common problems
• All 8452 plant care guides in the Growli library