Saving a Dipladenia (Mandevilla) with Yellowing Leaves After Bringing Indoors

Dipladenia (Mandevilla sanderii) is a tender tropical often grown as an annual in Zone 6 (Portland, OR). Bringing it inside for winter causes leaf yellowing and drop due to lower light and humidity.

Care Indoors

• Bright light – South or west window; supplement with grow lights if needed.
• Reduce watering – Let soil dry slightly between waterings.
• No fertilizer until spring.
• Expect leaf loss – The plant may go semi-dormant.

Spring Transition

After frost danger passes, move outdoors gradually. It will rebound with new growth and flowers.

For detailed care, see Weidner’s Dipladenia Guide.