What is happening to my Stephanotis plant ( madgascar jasmine,Bridal wreath)plant?

I have two , one is doing fabulous, growing blooming etc. The other one some leaves are turning yellow and getting black spots, and the tips of the vines are shrivelling, and the blooms are not developing just dropping off.


They are both in the same area and are treated equally .


What should I do.?

What is happening to my Stephanotis plant ( madgascar jasmine,Bridal wreath)plant?
I never heard of jasmines getting black spot, like roses, but anything is possible. It sounds like black spot to me and here's what I do with the roses;





There are a number of herbicides on the market to eliminate black spot.





With roses it is a constant monitoring of the leaves, removing the spoiled ones immediately, and never letting the spoiled leaves remain on the ground under the bush. The leaves can be disposed of or buried. Black spot is airborne, needs very little moisture and lots of sunlight. I use an herbicide on the bark and branches, assuring an end to the black blight - for a short time because the air is the air.
Reply:take a leaf to your local county extension service and have them id the pathogen. if the leaves are mushy its some type of rot, if the leaves are crackly then it isn't getting enough water for some reason.
Reply:Here's something to consider.





Have you checked the root area? Could be that when you bought them (if you bought them), that one could have been infested without you realizing it. Or, perhaps one is being overwatered. Since it is a seperate plant, there is obviously something going on with it personally - and may not have anything to do with what You are presently doing.