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Q.What is causing my Fragapani (Plumeria) potted plants to get yellow leaves that turn brown and drop off?

Zone Port Charlotte, Florida, Zone 10 | Anonymous added on May 26, 2020 | Answered

I planted 3 Fragapani (Plumeria) in pots last summer. The were on a raised site with full exposure to the sun. The plants dropped leaves very quickly. They turned yellow and dropped off. I am in zone 10 in Southwest Florida. Because it rains almost day in the summer, I thought this was a case of over watering. In late fall, I cut them all down and left them in the same location for the winter. This spring, new leaves grew and they were doing well. Two weeks ago, I moved them to a shadier site because it is protected from the rain. Ii have been watering them by hand using a meter. I have been trying to discover the right level to water them too. When the first plant had a few yellowing leaves, I cut back on the water some. Now all three have yellowing leaves. No pictures as already took all yellowing leaves off the plants. Can you help me?

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Certified GKH Gardening Expert
Answered on May 28, 2020

This is most likely a fungal infection from overwatering. Moving the plant will not treat the issue, but only spread it to multiple spots. In order to treat it, you will need a fungicide. This article will help: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

This article will help with growing plumaria plants: https://www.gardeningknowhow.com/ornamental/flowers/plumeria/growing-plumeria.htm

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