Knowledgebase
Star Jasmine Problems #745495
Asked April 21, 2021, 12:51 PM EDT
Washington County Oregon
Expert Response
No, lesions on the leaf are not rust.
To help fill in the details, please provide some information and 3 images of the affected plant:
- An image of the affected plant and its surroundings.
- An image of the plant, alone
- A close up image of an affected branch/stem.
- A history of the problem -- When did you first see it? Also, what treatments, if any, have been used, and what was the result?
I look forward to receiving your reply.
Sure, two photos attached. There are three plants along this fence. I have included a closeup of the plant on the right of the panel.
Started this year, earlier. Haven’t done any treatment except removal of discolored leaves, and that just today. We have another star jasmine in the front of the house that has similar leaves but not as profuse.
Thanks again,
Gordon
From: Ask Extension <<personal data hidden>>
Sent: Wednesday, April 21, 2021 11:37 AM
To: rgordonschmidt <<personal data hidden>>
Subject: Re: Star Jasmine Problems (#0015426)
Also, ensure that the plants receive adequate soil moisture. Available moisture is limited due to the narrow planting bed. In addition to that, water loss is accelerated due to the reflected heat from the concrete. Thus, the plants will need more water than on moderate to cool days or when it is overcast than on days when the sky is clear and the temperatures are high.
See Star Jasmine
I now this is closed but I wanted to be sure, are you saying it is normal for these leaves to look like this?
I notice lots of spots on the newer leaves as well.
Gordon
A close look at new growth in this photo.
The most recent image you sent reveals what appears to be winter damage resulting from cold, wet conditions. This will happen now and then throughout the years because Star Jasmine is a marginal plant for our climate. Some years it will make it through winter in prime condition, other years it won't.
As I mentioned previously, even though Jasmine is an evergreen plant, it does shed old leaves periodically.
Such shedding most often occurs as follows:
- Just as new growth begins
- After a water shortage.
Your assignments:
- - Remove and discard the all-yellow leaves because they are not contributing to the plant.
- - Consider leaving the speckled leaves at least for a while so that they can contribute to the plant's welfare.
- - Check the soil moisture content with a probe. Moist soil should be available to at least 6 inches deeep. If not, slowly irrigate until it is.
- - If the year continues to be dry, water every 3 to 4 weeks as needed. Probe the soil to know for certain.
If you have any additional questions, please ask.
