Close this search box.
Our Academy

9 Common Flower Diseases and How to Treat Them

flower diseases (1)
This is a helpful guide specifically for you on the most common flower diseases and how to treat them to help you keep your flower plant looking healthy.
Table of Content

Do you despise it when you put time and effort into your flower greenhouse only to have it ruined by a plant disease? Don’t give up! Being aware is winning half the battle.

We’ve prepared a helpful guide specifically for you on the most common flower diseases and how to treat them to help you keep your flower plant looking healthy.

So the next time you see an unusual substance on your plant, you’ll know what to do.  

But before that, let’s look at the benefits of growing flowers.

Benefits of Flowers

sunset, poppies, field-815270.jpg
  • The presence of live flowers in the home boosts positive energy.
  • Lavender and other flowering plants promote restful sleep.
  • Being close to flowers is good for your mental health.
  • You can use hibiscus and roses in cooking. They boost your immune system while also improving the flavor of your food.
  • Flowers can help to brighten one’s mood.
  • Flowers stimulate brain cells and improve memory by oxygenating the air.
  • Flowers also help to purify and depollute the air so you can breathe clean air.

With that in mind, let us look at the common flower diseases and how you can treat them.

Common Flower Diseases and How to Treat Them

Powdery Mildew

Powdery mildew appears as a white, powdery covering the leaf surfaces, as the name implies. The term refers to a group of closely related fungal species that affect one or even more plants. As a result, the powdery mildew on your lavender might not be the same as the one that’s wreaking havoc on your rose flower.

If the infection is severe, it may appear on stems and even the flowers themselves. Leaves that have been affected end up turning yellowish, then brown. 

未命名的设计 (13)


If only a few leaves are affected, pluck them off and discard them.

Use baking soda as a home remedy: Mix one tablespoon of warm water and baking soda; spray every seven to ten days on plants.

Grey Mold

Grey mold is one of the most common flower diseases. It’s especially troublesome when there’s a lot of rain and it’s cold outside. Gray mold, like powdery mildew, has a catchy name. It manifests itself as a grey mold on old and dying leaves and flowers. It starts as water-soaked spots and progresses to a grey, fuzzy coat.


Remove and destroy the infected plants so that the disease doesn’t spread to your other plants. Also, you can use sprays with bacteria controls on your flower plants to treat the infections.


This is a fungal infection that affects roses, as well as other flowers and fruits. While it does not kill plants, it makes them weak and more vulnerable to other issues. Some black spots appear on the foliage during the cold season, causing the leaves to turn yellow and then fall off.


Prune the affected plants and dispose of them. You can also use a natural solution such as distilled vinegar to remove the black spot.

You can also use neem oil to prevent black mold.


This fungal disease starts as fluffy, grey growth on flowers and quickly spreads to the stems, causing plants to become weak and cracked. Botrytis blight is typically controlled through better growing conditions and hygiene. Causes damage in flowers such as Rosa, Gerbera, chrysanthemum, and Lisianthus


Use recommended fungicides for treating botrytis.

 Make sure to remove any dead substance from the plant before the fall.

Root Rot

This soil-borne fungus stunts growth and causes wilting to leaves. Affected plant roots frequently have a wet, foul odor and a rotten appearance. Some plants may have black strands.


Remove the plant from its container and separate the soil from the root ball. Remove rotting roots with disinfected scissors.

To kill any bacteria, clean the pot with a hydrogen peroxide water solution. Apply fungicides early enough.

Leaf Rust

Leaf rust is an infection that damages flowering plants. It is frequently found on roses, hollyhocks, snapdragons, and daylilies. Rust diseases cause raised blisters on the undersurface of affected leaves, which rupture to release milky, bright yellow to red spores.

未命名的设计 (12)

The infection does not kill the plant completely, but weakens over time, making it more vulnerable to other diseases and winter damages.


Destroy diseased plants to stop the further spread and to make sure the area is clean. A fungicide approved for use against rust may be beneficial.

Ire Blight

This bacterial infection typically affects flowering plants, causing brown and withered flowers to appear first, followed by brown or black leaves. Cankers may appear on branches. The disease, mostly during rainy seasons, usually begins on the plant’s top section then under the leaf surface.


 There is no remedy for fire blight; the best fire blight treatments are regular trimming and removing any diseased stems and branches. Also,   avoid overhead watering because if you splash water over the plant, you create room for the spread of this infection.

Takedown and destroy any affected branches. Use the recommended fungicides.

Verticillium Wilt

This fungal disease causes wilting, as well as yellowing and drooping leaves. It usually appears first on the outer leaves. The  Yellow patches turn brown and cover entire leaves, causing the plant to die.

未命名的设计 (11)


Verticillium wilt has no treatment. Destroy diseased plants and refrain from planting those flower plants in that area for at least three years.


Plants with sooty mold have flecked stems and leaves. It has a black layer that you can easily wipe away with your fingers. The mold is drawn to the sweet “honeydew” that aphids and other sucking insects leave behind.


Wiping affected parts with water can sometimes be sufficient to remove the sooty fungal growth. Avoid strong detergents in the water because they can scorch the foliage.

Lukewarm water is more effective in sooty treatment.


If you see a sign of any of the above infections on your flower plant, it is best to have it inspected by a professional. It can sometimes be a simple solution, but it can affect your other plants if left uncontrolled.

We are a green solution manufacturing company that deals with crop protection netting. Our consumers have long enjoyed our services since we have been in existence for more than 23 years. Our netting products include frost protection, wind protection, pest control, bird control, ground cover, fruit harvest, among many others. Our quality is guaranteed.

So, contact us and make inquiries here today! Kindly also visit the Eyouagro for information on netting products.

Hey, I’m Kevin Lyu, the founder of , Family-run business
An expert of agriculture protection textile specialist .
In the past 26 years, we have helped 55 countries and 150+ Clients like farms, orchards , vineyards to protect their plants. The purpose of this article is to share with the knowledge related to agriculture growing protection for making the plant healthier and stronger.
Recent Posts
Kevin Lyu
Agrotextile Specialists

Hey, I’m the author of this post,
In the past 26 years, we have helped 55 countries and 150+ Clients like farms, orchards, and vineyards to protect their plants and crops. 
If you have any problems with it,
call us for a free, no-obligation quote
or discuss your solution.

We are at your disposal for any technical or commercial information


EYOUAGRO Repsects Quality Standards

Iso 9001 2015
Ukas Iaf

Let's Have a Chat


Your email information is completely secure and will not be disclosed to third parties for any reason.

booking eyouagro 1
Purchasing Agrotextiles
for Your Orchard from China?

Read Ten Cost-Saving Tips for the Purchase of Agrotextiles from China

Let's Have a Chat

We will contact you within 1 working day, please pay attention to the email with the suffix “”

Let's Have a Chat

Ask For Questions

Let's Have a Chat

Ask For Brochures

Let's Have a Chat