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Organic spray for Black Spot on Roses.

 
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J Smith
Foraging Bee


Joined: 13 Jan 2014
Posts: 169
Location: New Zealand, South Island, Southland, Riversdale.

PostPosted: Thu Feb 27, 2014 11:03 am    Post subject: Organic spray for Black Spot on Roses. Reply with quote

Seeing as how our Rose flowering for the year is coming to an end and the majority of forum members will be heading into Spring soon, this is a handy organic spray for roses that suffer from black spot- often prevalent during damp Spring conditions.

Organic spray for blackspot on Roses
In a 10litre bucket of water add 5 tablespoons of baking soda and a couple of splashes of compost tea or worm farm liquid and a dash of washing up liquid. Mix thoroughly and spray weekly.
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CeeBee
Foraging Bee


Joined: 16 Jun 2013
Posts: 104
Location: UK, Cambridge, Milton

PostPosted: Thu Feb 27, 2014 3:56 pm    Post subject: Reply with quote

...and is there any evidence that it works? And that adding Sodium bicarbonate to the environment isn't doing any harm?
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J Smith
Foraging Bee


Joined: 13 Jan 2014
Posts: 169
Location: New Zealand, South Island, Southland, Riversdale.

PostPosted: Thu Feb 27, 2014 6:29 pm    Post subject: Reply with quote

Works on our roses.
I would prefer to add Sodium Bicarbonate to the environment sooner than some of the store bought black spot sprays that have added insecticides to rid the roses of aphid at the same application. Sad
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