Blackthorn blossom
Prunus spinosa
Window
Typical: 25 Mar – 20 Apr (2026)
Often a cold snap. Bare-twig white blossom before the leaves come.
Relevance to fishing
The 'blackthorn winter' — blossom often coincides with a March/April cold snap that pushes water temps back down and shuts fish off briefly.
Phenology chain
Triggers
- Hawthorn (May) blossom typically 28d after (range 21 – 40d)
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Observation history (0)
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