Titchmarsh's first few television appearances were on the long-running BBC television show Nationwide as a horticulture expert.
This led to his being invited to present coverage of the Chelsea Flower Show for BBC television in 1983.
Titchmarsh hosted this every year until 2013.
In 2014, he was replaced by Sophie Raworth.
He also appeared on other BBC shows, such as Breakfast Time and Open Air as either a guest presenter or as a gardening expert, providing commentary and answering viewers' questions.

In 1991, Titchmarsh was brought in to host the long-running Pebble Mill at One BBC television talk show, which he did until its cancellation in 1996.
In 1991, he presented a 6-part series in which he followed in the footsteps of the pilgrims, travelling around Britain and Ireland in the process.

In 1996 the cancellation of Pebble Mill at One gave Titchmarsh the opportunity to move back towards his first love, gardening, and he took over as host of another long-running BBC television programme, Gardeners' World in the same year, the show being filmed in his own garden.
In 1997, he took gardening to the masses with BBC One television series, Ground Force, in which he and fellow presenters Charlie Dimmock and Tommy Walsh would perform a makeover on a garden, Titchmarsh making full use of his horticultural skills when restocking the lucky gardens featured.
The show has travelled as far as the United States and South Africa, where one episode saw the Ground Force team make over Nelson Mandela's garden.

Staying involved in gardening programmes after Gardeners' World, Titchmarsh has presented two series of How To Be A Gardener
Away from gardening, Titchmarsh has had spells presenting Songs of Praise and a series of programmes on BBC Radio 2 in which he played a selection of light classical music, as well as a BBC nature documentary series, British Isles - A Natural History.
In recent years, he has done less television and radio and spent more time on his career as a novelist and renewed interest in writing gardening books.

Titchmarsh has appeared in an advertisement for the Yorkshire Tourist Board (now Welcome To Yorkshire) as part as of a series which included contributions from other Yorkshire-born celebrities including Brian Blessed, Melanie Brown, Darren Gough and Brian Turner.
He occasionally does other voiceover work for advertisements as well as voicing the title character in Gordon the Garden Gnome, a cartoon series for the CBeebies channel.
In autumn 2007, Titchmarsh hosted a follow-up series to British Isles – A Natural History entitled The Nature of Britain focusing on British plant and animal species.

Other recent work included hosting a 2005 special edition of the Antiques Roadshow, entitled the 20th Century Roadshow, which focused on modern collectibles, performing in the 2006 Children's Party at the Palace for the Queen's 80th birthday, and guest hosting an episode of The Paul O'Grady Show while O'Grady was off for medical reasons.

In 2007 Titchmarsh hosted The Great British Village Show, in which gardeners and cooks from all over Britain competed to be the best at growing pumpkins, runner beans and tomatoes, and at knitting, baking cakes and making jam.
In September 2007 Titchmarsh began presenting his afternoon ITV chat show The Alan Titchmarsh Show which aired in the 3.00 pm afternoon slot.
The show ended in November 2014.

In 2010 Titchmarsh presented the first series of Popstar to Operastar with Myleene Klass.
Since 2011, he has presented gardening show Love Your Garden.

On 1 June 2012 he presented Elizabeth: Queen, Wife, Mother on ITV and was castigated the following day, for his obsequiousness, in a review by Sam Wollaston for The Guardian.

In spring 2013 Titchmarsh was a reporter on BBC Two programme The Great British Winter.
In December 2014 Titchmarsh presented a two-part series for ITV called The Queen's Garden that was filmed over a time period of one year.

In January 2015 Titchmarsh presented Britain's Best Back Gardens.
In February 2016, Titchmarsh began presenting the daytime game show Masterpiece for IT
Titchmarsh's first few television appearances were on the long-running BBC television show Nationwide as a horticulture expert. This led to his being invited to present coverage of the Chelsea Flower Show for BBC television in 1983. Titchmarsh hosted this every year until 2013. In 2014, he was replaced by Sophie Raworth. He also appeared on other BBC shows, such as Breakfast Time and Open Air as either a guest presenter or as a gardening expert, providing commentary and answering viewers' questions.
In 1991, Titchmarsh was brought in to host the long-running Pebble Mill at One BBC television talk show, which he did until its cancellation in 1996. In 1991, he presented a 6-part series in which he followed in the footsteps of the pilgrims, travelling around Britain and Ireland in the process.
In 1996 the cancellation of Pebble Mill at One gave Titchmarsh the opportunity to move back towards his first love, gardening, and he took over as host of another long-running BBC television programme, Gardeners' World in the same year, the show being filmed in his own garden. In 1997, he took gardening to the masses with BBC One television series, Ground Force, in which he and fellow presenters Charlie Dimmock and Tommy Walsh would perform a makeover on a garden, Titchmarsh making full use of his horticultural skills when restocking the lucky gardens featured. The show has travelled as far as the United States and South Africa, where one episode saw the Ground Force team make over Nelson Mandela's garden.
Staying involved in gardening programmes after Gardeners' World, Titchmarsh has presented two series of How To Be A Gardener
Away from gardening, Titchmarsh has had spells presenting Songs of Praise and a series of programmes on BBC Radio 2 in which he played a selection of light classical music, as well as a BBC nature documentary series, British Isles - A Natural History. In recent years, he has done less television and radio and spent more time on his career as a novelist and renewed interest in writing gardening books.
Titchmarsh has appeared in an advertisement for the Yorkshire Tourist Board (now Welcome To Yorkshire) as part as of a series which included contributions from other Yorkshire-born celebrities including Brian Blessed, Melanie Brown, Darren Gough and Brian Turner. He occasionally does other voiceover work for advertisements as well as voicing the title character in Gordon the Garden Gnome, a cartoon series for the CBeebies channel. In autumn 2007, Titchmarsh hosted a follow-up series to British Isles – A Natural History entitled The Nature of Britain focusing on British plant and animal species.
Other recent work included hosting a 2005 special edition of the Antiques Roadshow, entitled the 20th Century Roadshow, which focused on modern collectibles, performing in the 2006 Children's Party at the Palace for the Queen's 80th birthday, and guest hosting an episode of The Paul O'Grady Show while O'Grady was off for medical reasons.
In 2007 Titchmarsh hosted The Great British Village Show, in which gardeners and cooks from all over Britain competed to be the best at growing pumpkins, runner beans and tomatoes, and at knitting, baking cakes and making jam. In September 2007 Titchmarsh began presenting his afternoon ITV chat show The Alan Titchmarsh Show which aired in the 3.00 pm afternoon slot. The show ended in November 2014.
In 2010 Titchmarsh presented the first series of Popstar to Operastar with Myleene Klass. Since 2011, he has presented gardening show Love Your Garden.
On 1 June 2012 he presented Elizabeth: Queen, Wife, Mother on ITV and was castigated the following day, for his obsequiousness, in a review by Sam Wollaston for The Guardian.
In spring 2013 Titchmarsh was a reporter on BBC Two programme The Great British Winter. In December 2014 Titchmarsh presented a two-part series for ITV called The Queen's Garden that was filmed over a time period of one year.
In January 2015 Titchmarsh presented Britain's Best Back Gardens. In February 2016, Titchmarsh began presenting the daytime game show Masterpiece for IT
Alan Titchmarsh