Yellow And Wilted Leaves On Mandavilla Vine

Question

we live in townsville north queensland and it is a sub tropical inviroment, plant is potted and situated on verandah and is partly shaded, watered via a dripper system at odd times,have enclosed two photos, hope that you can give me advice and a reason for this.

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Answer 1

It looks like infection from overwatering. You will need to treat with a fungicide, and make sure to only water when the soil is completely dry down to about 2 or 3 inches.

This can also be worsened by too much light. They should receive quite a bit of shade throughout the day, as well.

Here are some articles that will help:

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

https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm