Post a reply

Avatar for Scottwh21
May 9, 2020 10:15 AM CST
Thread OP
Ventura, CA
How do I stop white fungus on hibiscus?
Thumb of 2020-05-09/Scottwh21/3e920b

Thumb of 2020-05-09/Scottwh21/cbf30e
Last edited by Scottwh21 May 10, 2020 11:51 AM Icon for preview
Avatar for oneeyeluke
May 9, 2020 2:22 PM CST
Name: one-eye-luke US.Vet.
Texas (Zone 8a)
Quitter's never Win
Birds Cat Lover Dog Lover Hummingbirder Organic Gardener
Powdery mildew is a common disease on many types of plants. There are many different species of powdery mildew fungi like, Erysiphe spp, Sphaerotheca spp, and each species only attacks specific plants. Don't overhead water your pants and keep the falling leaves pick up and thrown away to prevent it from spreading. Wet leaves cause Powdery mildew and the spores lives on the infected leaves waiting for the right conditions. .
NOT A EXPERT! Just a grow worm! I never met a plant I didn’t love.✌
Avatar for SoulReaver009
May 9, 2020 3:10 PM CST
Milpitas, CA
You gotta cut them off. They mature during the day in the sun, and release pores at night, under the moon. And then spread like crazy. I had to cut down a few of my plants to stop it from spreading.

It's gonna be a real hack job, but it's either that, or you lose the foliage and flowers anyways, AND it could spread to your other plants.

Check your other plants. And cut the leaves that have it, cut the adjacent ones, even if you don't see it. Good luck. I don't want to tell you to cut, cut, cut. I don't want to tell you to do something that could kill your plant. But mildew is not lovely. You could just let it be. And it will die when the seasons change. And next year you will have green foliage again. Do not water overhead, or at night. Water very early in the morning. Mildew forms when it is humid and wet, at night. Humidity is present in the cold. So don't think it has to be hot or warm. Although, warmer temps do help it grow faster.

Good luck again!
Avatar for luis_pr
May 10, 2020 11:44 AM CST
Name: Luis
Hurst, TX, U.S.A. (Zone 8a)
Azaleas Salvias Roses Plumerias Region: Northeast US Region: New Hampshire
Hydrangeas Hibiscus Region: Georgia Region: Florida Dog Lover Region: Texas
Are these hydrangeas? The leaves do not look right for hydrangeas. Maybe hibiscus? Hard to see the shrubs in all the foliage. Maybe a shot from afar might help.
Avatar for Scottwh21
May 10, 2020 11:53 AM CST
Thread OP
Ventura, CA
Thank you so much! I will cut back the infected parts and only water in the morning.
May 10, 2020 12:19 PM CST
Name: Carol
Santa Ana, ca
Sunset zone 22, USDA zone 10 A.
Bookworm Charter ATP Member Region: California Hummingbirder Orchids Plant Identifier
Lover of wildlife (Black bear badge)
There are numerous sprays for mildew/fungus available, and if you're in the coastal area it will be quite a while before you see much sun. "May Grey" and "June Gloom" are facts of life in coastal areas.... and again Never Water Overhead!
Only the members of the Members group may reply to this thread.
Member Login:

( No account? Join now! )

Today's site banner is by JebobaTea and is called "White Flower Fireworks"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.