Marsh marigold flowering

Window

Typical: 25 Mar – 15 May (2026)

Water temp trigger

~7.0°C

Latitude range

50-52°N

Early wet meadow indicator on the Eastern Yar floodplain. Bright yellow flowers in marshy ground tells you the shallow margins have lifted into single-figure °C.

Relevance to fishing

Wet-meadow indicator at the riverbank. Coincides with shallow water warming through 6-8°C — the same threshold tadpoles emerge at, and within a few weeks of perch grouping up in marginal weed.

Phenology chain

Triggers

• Tadpole emergence from spawn typically 14d after (range 7 – 21d)