Narcissus Fly: When is it safe?
Roy Herold (Wed, 06 Aug 2008 14:03:54 PDT)

I had a terrible time with narcissus fly getting into my pots of
cyrtanthus when they were outside last summer (2007), so this year I put
them in a coldframe covered with a screen (window type). Thinking that
the danger of fly infestation was passed, I took the screen off a couple
of weeks ago, mainly because flower scapes were running into it.

Did I take it off too soon? Or could I have removed it much earlier, and
if so, when?

The cyrtanthus really seem to have thrived in the screened environment,
irrespective of whether it kept the flies off. It gave a little extra
shade, and a bit of protection from the incessant thunderstorms we have
been having this summer. Lots of bloom, even on the 'difficult' C. tuckii.

--Roy
Northwest of Boston
8" of rain in July!!