Why Is Healthy Appearing Mandevilla Vine Dropping Green Leaves.

Question

Plant has much new growth with small buds, slow growing. It is one of 4 plants purchased together. 3 others doing beautifully.

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Answer 1

Check the leaves carefully for pests. Spider mites and scale can go unnoticed. I also included information on diseases.

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

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

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