Plumeria branch has some soft areas.

Question

A few branches on my plumeria plant have some soft spongy areas up toward the flowers. What is this? What can I do to help the plant? I don’t over water the plant and always from the bottom of the plant not on the flowers.

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Answer 1

It looks like a fungal issue, likely verticulim wilt. This is caused by overly wet soil, or watering too often without letting it dry out thoroughly down to 3 or 4 inches for this plant. They will not tolerate wet roots without a good dry out between each watering.

This will have to be treated with a fungicide. This article will help: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

It would also be beneficial to put a tablespoon of dolomitic lime and a teaspoon of wettable sulfur around the root zone. This will help to remove the infection from the soil. Do this once or twice per year for added protection.

This article will help you with the general care of the plant: https://www.gardeningknowhow.com/ornamental/flowers/plumeria/growing-plumeria.htm