Blossom Jackson made her first appearance on 16 May 1994. She is portrayed by Mona Hammond.
Blossom is the grandmother of Alan Jackson. Originally from Tobago, born there in 1926, she came to Britain as a young child and grew up in east London. Her first marriage to Nathan ended after he deserted her, and she spent the latter part of her life living with her common-law husband, Bill, until he died in 1993.
On screen, she comes to live with Alan and his common-law wife Carol at 25 Albert Square in 1994 after her flat in Wapping is burgled. Blossom is great-grandmother to Billie Jackson and although she is not blood-related to the other Jackson children, Bianca , Robbie and Sonia, she loves them as if she were. Blossom is a great support to Carol during her time living in Albert Square, often providing a sympathetic ear when she needs a shoulder to cry on. She works in Kathy Beale's café and has a brief romance with Walford lothario Jules Tavernier, even moving in with him temporarily when the Jacksons' house is damaged in a gas explosion. However, their relationship does not progress into anything serious.
She later embarks on a more serious relationship with local barber Felix Kawalski. Felix is a Jewish Holocaust survivor who was separated from his family as a child. Even though Felix does not know where his family are or even if they are still alive, he has spent his whole life trying to find them. He eventually tracks his sister down in Israel, and after making contact with her, he decides to live with her there. He later returns for a brief visit to ask Blossom to move there with him, and she accepts his offer and leaves Walford in 1997.
Off screen, Blossom later returns to England to live with Alan and Billie in Balham. By February 2010, Alan and Carol have apparently split, with Carol and Billie moving to back to Walford and Alan to Forest Hill, leaving the whereabouts of Blossom unknown. However, she returns to Walford in October 2010 with Alan, his wife and their son Kai, for Billie's funeral after he dies in his sleep while celebrating his 22nd birthday. When Carol says she cannot go to the funeral, Blossom tells her they are saying goodbye to Billie no matter what. Afterwards, she tries to convince Carol to go to the wake as she has rejected her entire family. At Billie's wake, Blossom realises that Carol's nephew Bradley Branning has not attended and is told that he died several months earlier. She mentions that her partner Felix had died in 2006. She and her family return home after the wake.