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Why are my Protea leaves turning brown

Protea leaves turning brown - can't see any pests.

Australian Natives • Diseases

Dear Brian,

From the photo you sent, your protea looks well established and appeared to be going quite strongly. Something must have happened to cause all those leaves to brown off. Would you have fertilised recently with any product? Photeas are very sensitive to fertilisers with a high phosphorus level. Also, could the drainage have been altered recently? Protea require a well drained position and don't like having wet feet. Phytophthora root rot is a fungus that infects the roots of the plant and causes the leaves to yellow, and die. The branches die back from the tips. This could be your problem. It might be wise, to spray some Anti Rot Phosacid systemic fungicide. This product works as a preventative as well as a curative and can be used on native plants. When sprayed onto the leaves, the product is absorbed and then travels down to the root system. It boosts the plant's self defence mechanisms, giving it the ability to prevent disease taking hold as well as helping to cure disease that already exists. To help your protea on its way to recovery, Yates have a product call Yates Dynamic Lifter Liquid Concentrate. It's a organically certified fertiliser, which contains seaweed, blood&bone and fish meal to help developing new roots and restoring healthy growth. I do hope you are able to save this stunning native plant.



Answered: 8 Nov, 2011

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