What are they - Huge yellow flowers fields in England 'n Europe?

On travelling from England to Europe, my mom notices huge stretches of yellow flowers. What are they? Their use? Wild plants or are they grown with purposes ?Thx!

What are they - Huge yellow flowers fields in England 'n Europe?
At this time of the year they would be daffodil nurseries fields, growing on the bulbs for sale next year. The only other flowers they could be is rape, but this plant is common in Great Britain, early summer.
Reply:It is a CROP rather than a flower, though it does have a bloom. It is called RAPE SEED and they use it to make oil. In the spring England, and a great deal of Europe, have massive carpeted fields of Rape Seed as far as the eye can see. The daffodils are lovely too - but they are along the roads, roundabouts, and homes.
Reply:Wordsworth wrote of such a thing.





I wandered lonely as a cloud, that floats on high o'er vales and hills.


When all at once I saw a crowd, a host of golden daffodils.


Beside the lake, beneath the trees, fluttering and dancing in the breeze.


Ten thousand saw I, at a glance, tossing their heads in sprightly dance.
Reply:Depends what time of year, could have been Rapeseed (grown for oil), sunflowers (grown for seeds and oil), or as the previous answer states - daffodils.
Reply:if its rapeseed, its a crop and its poisonous!! beware