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White leaves on Rosemary

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We have several very healthy Rosemary plants but now I see that leaves on one plant have gone white and it has quickly affected most of that plant I can see white leaves appearing on another Rosemary. Is it time to pull up the affected plants and destroy them or is it something that Rosemary will go through after a good season of growth please
Hello again - thanks for your reply. It's not a fungal thing - the actual leaves have gone white and the stems look a bit sickly I think - Not rigid anymore and slightly bent over at the tips.



If you can rub off the white deposit, its probably a mildew infection - spray with a suitable fungicide.

31 Aug, 2009

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