Mandevilla
Mandevilla is a flower in the Apocynaceae family. It grows best in full sun with medium moisture, and is listed for USDA zones 9-11.
Varieties
1 · sorted by days to maturity▸Mandevilla
PROPAGATION CATEGORY: Tropical vine (annual/container) (not in original seed catalog). Use: Big trumpet flowers all summer on a trellis. Note: Sap is mildly toxic/irritant.
Mandevilla is a tropical flowering vine with glossy leaves and showy trumpet blooms, grown on a trellis or in containers and overwintered indoors where frosts occur.
Growing notes: Botanical name: Mandevilla spp.|Hardiness zones: 9-11|Propagation: cutting|Light: Full sun|Water: Medium|Mature size: 3-10 feet (vine)
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Growing timeline
Care & troubleshooting— extension-sourced, with citations
When to feed, prune & water
Attract beneficial insects and protect pollinators
Protection- Routine carePlant insectary flowers and tolerate light pestsstrong evidence — extension confidence
Grow a diversity of flowering plants (including small-flowered umbels and asters) to feed predators and parasitoids, and tolerate low pest numbers so natural enemies have prey to stick around.
- Routine careNever spray open bloomsstrong evidence — extension confidence
Avoid insecticides on flowering plants and apply any needed sprays in the evening when pollinators aren't active, and favor selective products over broad-spectrum ones to spare bees and beneficials.
Support monarchs on milkweed
Care- Routine careTolerate aphids; never spraymoderate evidence — extension confidence
Milkweed feeds monarch caterpillars and pollinators, so skip insecticides entirely. Oleander aphids look alarming but rarely harm the plant — knock them off with a water jet or wipe them off by hand and leave the rest for the butterflies.
Something looks wrong?
Describe what you see on your mandevillaand we'll rank the likely causes — most likely first, least-invasive fix first.
Aphids
Pestlow- CulturalBlast off with water· every 3 days · ~2 wksstrong evidence — extension confidence
Knock colonies off with a strong jet of water in the morning; repeat every few days. Light infestations rarely need more.
- OrganicInsecticidal soap - label use only· every 1 wk · ~3 wksmoderate evidence — extension confidence
For persistent colonies apply insecticidal soap to undersides per label. Avoid open flowers.