I think that your bulbs probably multiply as fast as the fly attacks them Mark. I have often observed this when dividing congested clumps. There are usually lots of infected bulbs which produce several smaller bulbs from the damaged basal plate the following year...... Peter (UK) On Tue, Apr 9, 2013 at 8:36 PM, Mark BROWN <brown.mark@wanadoo.fr> wrote: > Dear Jane, > there are fine colonies in the sunny meadows of Narcissus pseudonarcissus > as well as wild snowdrops here. > I grow both in sun as well as in a more shaded area under hazel trees. > > > > >