On 12/09/2016 11:07, Jim S wrote:
Why do some busy lizzies suddenly die at this time of year and others
nearby don't?

Outdoors frost pockets or it could be impatiens downy mildew (which
decimated the stock of a local nursery a few years back).

https://www.rhs.org.uk/advice/profile?pid=205

Regards,
Martin Brown