Why are my Michaelmas Daisies dying?
By Rolando
United Kingdom 
We have planted some Michaelmas Daisies, however they seem to be dying from the bottom up. They have a kind of white powder on the leaves. Any ideas on why this is happening would be much appreciated.
12 Jul, 2009
Answers
If it's a Aster novi-belgii this is a very common problem - try Aster novi-anglii, frikartii or amelus, much more resistant.
13 Jul, 2009
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the powder is a fungal infection called mildew. you should be able to buy a fungcide to treat them at the garden centre.
12 Jul, 2009