Hawaiian Ti and Mandevilla in New Orleans: Winter Reality Check

Zone 9a Marginal: Both Plants Need Winter Protection

New Orleans (Zone 9a) planting Hawaiian Ti (Cordyline fruticosa) in full sun and Mandevilla in morning sun: both are tropical and risk freeze damage.

Hardiness Reality

• Ti plant: Hardy to ~30°F brief; sustained freeze kills to ground. Resprouts from base if corm survives.
• Mandevilla: Hardy to ~35°F; vine dies back, may not return reliably.
• Zone 9a: Avg min 20–25°F. Freezes occur most winters.

Better Strategies

1. Containers: Move to garage (40°F+) during freeze events
2. Microclimate: South wall, under eave, near heat-radiating structure
3. Heavy mulch + frost cloth for in-ground (marginal)
4. Hardy alternatives: Yucca, Agave, hardy palms, ornamental grasses for full sun; Confederate jasmine, Carolina jessamine for vine

Mandevilla Specific

Requires trellis/structure. Morning sun only = reduced flowering. Full sun preferred.

Expert Resource

LSU AgCenter Cooperative Extension (Parish office) for Zone 9a plant lists and Master Gardener advice.