Snowdrop grey mould is a common fungal disease that attacks snowdrops (Galanthus). It causes the flowers, leaves and flower stems to collapse and die, and rot away. A fuzzy grey mould appears on all affected plant parts
Snowdrop grey mould is more prominent during cool, humid or wet weather when a fuzzy grey mould appears on all affected plant parts. It is also more of a problem during or just after mild winters. Infection can start as soon as the foliage appears above ground level.
The infection can also spread to the bulbs, which then rot away. You may be able to see small, black, seed-like structures (called sclerotia) on the bulb surface, or at the base of the flower stems, leaves or roots.