Your worst 5 Garden Plant Diseases

Sometimes it feels like a minefield in the garden when it comes to knowing what garden diseases can affect your plants. These articles from Gardening Direct will help you identify and eliminate your worst garden diseases.

This series of articles from Gardening Direct will help you to spot the signs of common garden diseases and give you helpful advice on how to prevent infestations and treat them if they take hold.


Your guide to garden diseases 

Are your plants covered in grey mould? Or turning a rusty orange? Gardening Direct has created a helpful guide on how to spot and treat the most common garden diseases - powdery mildew, rose black spot, rust, root rot and grey mould.

Below is a quick and easy guide for easy reference to help you spot garden diseases and safeguard your garden. Print it out as a useful reference so you know what to look for and the kind of resources available to you.

Signs of Infestation

The surface of the leaves develops spots or patches of white to greyish talcum powder-like growth.

Learn more about Powdery Mildew


Signs of Infestation

This fuzzy grey mould grows on buds, leaves, flowers and fruit. It especially attacks injured or stressed plants.

Learn more about Grey Mould

Signs of Infestation

Small pin-head sized black spots on the leaves if unnoticed the spots increase in size to become large black or dark purple spots on the surface of the leaves or stem.

Learn more about Rose Black Spot

Signs of Infestation

Rust coloured spots and irregular discolouration on plants as leaves and stems start to appear.

Learn more about Rust

Signs of Infestation

The plant will be slowly wilting and the leaves turning yellow. If you try to touch the plant it will feel mushy and look black in colour. The roots affected may literally fall off the plant when you touch them.

Learn more about Root Rot


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