Vincetoxicum oblongum Plant Care
Vincetoxicum oblongum (N.E.Br.) Meve & Liede
Updated · Sources · How we source care data
Vincetoxicum oblongum is a species of plants in the family Apocynaceae, native from west tropical Africa to south-west Ethiopia. Its synonyms include Oncostemma cuspidatum, at one time placed as the only species in the genus Oncostemma.
Every 7–10 days
Bright indirect to partial shade
60–80°F
40–60%
At a glance
How do you care for Vincetoxicum oblongum?
Water Vincetoxicum oblongum every 7–10 days, letting the top layer of soil dry out between waterings, and give it bright indirect to partial shade. It prefers temperatures of 60–80°F (16–27°C) and 40–60% humidity. Fertilize it every 6 months during the growing season. It is reported as toxic to pets, so keep it out of reach of pets.
What Is the Vincetoxicum oblongum?
Vincetoxicum oblongum (Vincetoxicum oblongum) belongs to the Apocynaceae family within the Vincetoxicum genus.
Vincetoxicum oblongum displays a vining, twining habit growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Vincetoxicum oblongum produces small, star-shaped white flowers in clusters.
Leaf size: approximately 3 inches.
How Often Should You Water a Vincetoxicum oblongum?
Vincetoxicum oblongum requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Vincetoxicum oblongum Need?
Vincetoxicum oblongum thrives in bright indirect to partial shade. Avoid placing Vincetoxicum oblongum in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect to partial shade
What Temperature and Humidity Does the Vincetoxicum oblongum Prefer?
Vincetoxicum oblongum grows best at temperatures of 60–80°F. Vincetoxicum oblongum prefers humidity levels of 40–60%.
Temperature
60–80°F
Humidity
40–60%
What Soil Mix Works Best for a Vincetoxicum oblongum?
Well-draining loamy soil mix with added perlite for improved drainage. Good drainage is essential for Vincetoxicum oblongum to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Vincetoxicum oblongum?
Feed Vincetoxicum oblongum every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Vincetoxicum oblongum?
Repot every 1-2 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Vincetoxicum oblongum?
Vincetoxicum oblongum can be propagated through seeds, division of rhizomes. Similar propagation techniques also apply to white swallow-wort plant care, which shares the same genus.
Is the Vincetoxicum oblongum Toxic to Pets and Children?
Toxic (caution)
Reported as toxic in our plant data. Not verified by the ASPCA.
Toxic to humans and pets if ingested
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Vincetoxicum oblongum?
Vincetoxicum oblongum is susceptible to aphids, spider mites, mealybugs. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Vincetoxicum oblongum Need?
Vincetoxicum oblongum grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. In cooler regions, grow Vincetoxicum oblongum as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Vincetoxicum oblongum is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Vincetoxicum genus — compare its care with other Vincetoxicum species on PlantoScan.
Vincetoxicum is part of the Apocynaceae plant family — browse all Apocynaceae genera and species.
Vincetoxicum oblongum thrives in bright light and direct sun — see other bright-light plants.
More Vincetoxicum Species
Other Vincetoxicum species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Vincetoxicum oblongum (N.E.Br.) Meve & Liede, family Apocynaceae (first published in Phytotaxa 369(3): 157. 2018 [18 Sep 2018] [epublished]) — World Flora Online record, IPNI name record.
- Pet toxicity: Vincetoxicum oblongum is reported as toxic to pets in our plant data (not verified by the ASPCA), so treat it with caution. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 13a, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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