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By Granny

Cumbria, United Kingdom Gb

I have a climbing rose & yet again this year the buds have mildew. Sprayed a few times with Scotts Roseclear Ultra Gun, but it has not kept it away. ( I spray against blackspot too) Is there an organic product which would be better ? I have heard that tea is used, but how effective it is in doubt.Otherwise the plant has grown very well over an archway & has several buds this year. The ground is not dry.



The only product I have found that works extremely well on this fungal disease is called Green Cure. Potassium bicarbonate is one its main ingredients. Apply this fungicide as directed to treat powdery mildew.

10 Jul, 2015


Roseclear is a good treatment, but it must be used regularly, I think its fortnightly as I recall, according to the instructions on the bottle, or mildew will recur. If its powdery mildew, you can use 1 part cow's milk to 9 parts water and spray with that weekly, but for black spot, you'd need 3 parts milk to 4 parts water, again weekly, so that's a lot of smelly milk dripping off your bushes. The milk treatment is ineffective on Downy Mildew though.

10 Jul, 2015


Thankyou. I'll look out for Green Cure, & will certainly try both suggestions. I am very conscious of not harming bees & I read on the Roseclear container it should be used early in the day. Not so easy if it's raining!but of course that applies to all treatments. Hopefully with care & vigilance I'll get a good rose arch this year.

11 Jul, 2015

How do I say thanks?

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