Home > What we record and why > Species we record > Shrubs > Blackthorn > First flowering

First flowering

Record blackthorn first flowering when the petals of the first flower are open sufficiently for you to see inside the flower.

Expected Date Range: mid-February to mid-April  

Available historic data: we have good data from 1935-1939, and 1942-1954. We have some records from 1992-1998. 

Just right

  • (Kylie Harrison Mellor/WTML)

Too early

  • (Kylie Harrison Mellor/WTML)

Too late

  • (Kylie Harrison Mellor/WTML)

Not to be confused with

  • Hawthorn (Crataegus monogyna). Blackthorn flowers before it leaves, whereas hawthorn will flower after it has its leaves (WTML).