"Hay Fever" is an episode of the BBC sitcom, The Green Green Grass. It was first screened on 30 September 2005, as the fourth episode of series one.
As Boycie and Marlene are only just dealing with the fact they have a gay bull and a miserable Welsh next door neighbour, they can't be doing with Tyler around the house all day and all night either. So they think it's time he started at his new school, to his total disgust. Meanwhile, Elgin orders a herd of cows as 'Farmer Boyce' instructed. But Marlene insists they buy only six cows and she is extremely annoyed when she arrives home and finds three hundred cows on the farm.
This episode was written by John Sullivan, writer of Only Fools and Horses. The whole of the first series was written entirely by John Sullivan.
During its original airing, the episode had a viewing audience of 6.33 million, in the 8:30pm timeslot it was shown. This is the same audiences that sitcoms such as My Family attract.
This episode has since been re-run on BBC One, BBC HD and Gold. The show received one of the highest ratings of the week making it into the top thirty.
The UK DVD release was released on 23 October 2006. The release includes the 2005 Christmas Special, a short special entitled 'Grass Roots' and a short documentary on 'Rocky'.