leaves on mandevilla turn yellow and fall off

Question

Why do some of the leaves on my Mandevilla turn yellow and fall off? Plant is under a cloth gazebo with eastern exposure, gets morning and late afternoon sun.

Answer 1

Yellowing leaves can indicate a watering issue, to much or to little.

Proper lighting and even insects can also be causes.

Here is a link to refresh you on the care requirements.

https://www.gardeningknowhow.com/ornamental/vines/mandevilla/mandevilla-plant.htm