Old 04-11-07, 08:37 AM
Thread Starter
Join Date: Jan 2007
Posts: 5
Unhappy Gardenia

My gardenias' leaves are small and black, it looks to me as mildew. Any help please. TIA
Sponsored Links
Old 04-11-07, 08:56 AM
Join Date: Aug 2000
Location: USA
Posts: 15,834
Sounds like your gardenias have sooty mold. See for common fungus problems for gardenias.

Sooty mold coats gardenia leaves in summer. This is usually due to an infestation of whiteflies, which look like bits of cotton. Like aphids, which cling to undersides of leaves, they excrete honeydew on which the fungus feeds. Using horticultural oil spray as an insecticide is helpful, as oil gets rid of many of the insect pests and also softens the black fungus so it can be washed off easier by rain or other means. Spray in such a way that both the upper and undersides of leaves are treated.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes