I just brought a potted hibiscus plant inside for the winter. It is losing all of its leaves. They are turning yellow and have grayish brown spots on them. From researching online, it looks to be flyspeck. What can I do to treat it? Also, how much light does it need during the winter? My house does not get a lot inside. Thanks!
Flyspeck on Hibiscus
Certified GKH Gardening Expert
It is common for plants brought indoors for the winter to lose their leaves or have yellowing leaves. This is because of the lower light levels and change in environment the plant experiences. Your plant's symptoms might be as simple as this. Giving the plant more light will help, such as with a grow light, but even if you don't, the plant should be fine and should recover in spring.
In case this is flyspeck, reducing the humidity near the plant can help control flyspeck. Fortunately this is not a very harmful disease and your plant should recover when it goes outside again in spring.