Oleanders (Nerium oleander) are low-maintenance, drought-tolerant plants that bloom all summer and sometimes into fall. They are usually evergreen but can be damaged by temperatures of 20 degrees Fahrenheit and below and lose their leaves.

Why are my oleander leaves falling off?

Cultural Causes of Oleander Leaf Drop

Oleanders are more common in warm regions but can withstand winters in temperate zones. ... Too much water and too little water can cause yellowing leaves and leaf drop. In the summer, water the bushes 1 to 2 times per week, deeply. Make sure your plant is in well-draining soil.

Do oleanders stay green in winter?

Extreme winter cold and temperatures of 10 degrees Fahrenheit can damage flowers and normally evergreen leaves. If the thermometer drops even lower, the oleander's top growth may be damaged, but probably will regrow from the roots in the spring.