Amid the wet and grey gloom of February, gardeners across the UK are reporting that crocuses are pushing through their lawns and borders weeks ahead of schedule. This phenomenon is no quirk of nature. Crocuses flowering early in 2026 is a sign of shifting seasons, driven by a unique combination of biological triggers and record-breaking UK weather patterns.
Crocuses are thermoperiodic plants, which means they rely on temperature cues rather than day length to dictate their lifecycle. Their corms (a type of bulb) also usually need a cold spell in autumn to prompt an annual reset before they will start to grow toward flowering around March.
