Can anyone tell me what is making the leaves turn yellow and fall off my Diplodemia? It's all-over growth seems to have slowed a bit also. I over-wintered it in my garage and was careful to remove the dead leaves in the pot beforehand. This same problem was happening last summer and now it's baaackkk! :(

I don't know what causes that, but I have a small one potted up in my greenhouse. Right now it's doing the same thing. I've searched carefully for insects and other than an occasional whitefly I haven't seen anything worse. I was wondering if mine might be that it is watered with very hard water.

Maybe! Thanks Karen. When I first saw it happen I treated it with Daconil, waited a week and sprayed it with Neem oil. It still bleeds it's white sticky sap when I pinch the leaves off and I think that's a good sign. I live in a rural area and we also have very hard water here. I have recently made a rainbarrel and I am going to try watering it exclusively from there. I'll let you know what happens. Please let me know if you find out anythimg else. Good thinking...thanks!

I recently started watering mine with distilled water. I'd love a rain barrel setup. We have the barrels but no rain. We're in a bad drought at our place in NM. If I find anything that works, I'll let you know. When it blooms, I love it so much!

I wonder if the plant is just changing leaves or slowly redirecting energy to make new blooms. Sometimes it does that. Has your temps been consistently warm lately or did it happen to go back to some cool degree..it also does that when there is sudden temperature variance..

We did have a couple of cold nights. However, it started the yellowing before the 2 cold (50°) nights that we had here in Ga. It was still blooming and growing last summer when it did this. My biggest concern was some kind of fungus.:crying:

It is usually a thirsty plant come summer time. I have mandevilla, and it goes into that cycle, and got to step up watering when it begins to warm up and go hotter and dry in my area. Oftentimes, it will shed some leaves deliberately as it tries to conserve its own resources, and just keep what it can sustain during our dry period.