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Growing Mandevilla in Extreme Heat: Watering and Alternative Vines for Arizona

Mandevilla tolerates triple-digit heat but needs deep watering every 3–4 days in peak summer. “Deep” means a trickling hose for 45 minutes or a soaker hose/sprinkler for over an hour—not hand watering.

Other heat-tolerant vines for Lake Havasu City:

  • Hardenbergia violacea
  • Queen’s Wreath / Coral Vine (Antigonon leptopus)
  • Yellow Orchid Vine (Calleum macroptera or Mascagnia macroptera)

All thrive in intense sun and heat.

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