Over night this has seem to show up on my white lace vine and is spreading quite fast. We have had a really rainey wet week here in michigan and I'm not sure if it is from being too wet? My son had his bubble machine out near this area yesterday too, could they have damaged the leaves?
I'd chalk this up to root suffocation or infection from being so wet. Fungicides might be necessary, here:
This is what is happening to my very young Silver Lace Vine. This is the 2nd year in the ground. Direct sun all day. The leaves started to turn in the past few weeks. I hope these pictures of the leaves front and back will give you answers for me. Thank you Kathi
This is, likely, Rust disease. This can be treated, but the environment must chance, as well. The area must be allowed to dry out between watering, if possible, and fungal treatment is necessary. This can be done with Neem oil, or a general fungicide.
My silver lace vine is at least five years old, probably older. Last summer it bloomed for the first time. This year it did not bloom. It was spectacular last summer. Thanks
I suspect that the flowering cycle could have removed the remaining potassium and phosphorus Leaving more nitrogen. This can also acidify the soil, which will make the potassium and phosphorus less available.
Alternatively, soils that are overly rich with nutrients will cause a shortage of growth AND flowering for this invasive vine.
Fortunately, you can test these things: