25 May 2017 Last updated at 07:00 BST
He met Newsround at the world famous Chelsea Flower Show, where top gardeners show off their best designs and compete for awards.
George is an ambassador for the Royal Horticultural Society, which runs the show, and he even has his own blog.
Watch his video to find out what's so great about gardening.

They feature on the International Impac Dublin Literary Award's 2016 longlist, alongside BBC journalist Kirsty Wark's debut The Legacy of Elizabeth Pringle.
Libraries in 118 cities around the world nominated 160 books.
The 100,000 euro (Â£71,300) prize winner will be announced on 9 June 2016.
Other British nominees include this year's Bailey's Women's Prize for Fiction winner, How To Be Both by Ali Smith.
The Miniaturist by Jessie Burton, The Bone Clocks by David Mitchell, Caitlin Moran's novel How to Build a Girl and David Nicholl's Us are also on the longlist.
This year it includes 53 novels in translation with works by 44 American, 10 Canadian, 10 Australian, seven Irish, six German and three South African authors.
Past winner Colm Toibin from Ireland is nominated again for Nora Webster, while another former winner, Norwegian Per Petterson, is on the list for Out Stealing Horses.
"Reading groups worldwide each year anticipate the longlist and later the shortlist with excitement and interest," said Dublin city librarian Margaret Hayes.
"From previous experience we know that the 21st winning title will be top of the library readers list for 2016 at home and abroad, bringing readers together in an unparalleled international book club."
Jim Crace won the prize last year for his novel Harvest, while Irish author Kevin Barry won for his debut novel, City of Bohane, in 2013.
This year's Man Booker Prize-winner, A Brief History of Seven Killings by Marlon James, and the winner of the 2014 Governor General's Award for Fiction, The Back of the Turtle by Thomas King, are also nominated.
The full list of British titles in the running:

The motorist received a Â£100 fine and three points on their licence.
Dorset Police said when the driver was stopped he said: "I was trying to find that new Sam Smith song on You tube because I didn't have it on my phone."
The singer has released the song Writing's On The Wall as the theme to the new James Bond film Spectre.
Officers were carrying out checks on traffic offences on Thursday and stopped vehicles which had no insurance as well as others breaking the speed limit.
Spectre sees Daniel Craig return as British spy James Bond, aka 007, in a globe-trotting blockbuster named after a sinister criminal syndicate.
Two-time Oscar winner Christoph Waltz, French actress Lea Seydoux and Italy's Monica Bellucci also appear in the 24th official entry in the long-running series.

Australia's foreign minister said these were "not the actions of a friend".
The UK took similar action in March, after concluding that Israel was responsible for the use of forged UK passports in the plot.
The Israeli foreign ministry said Australia's decision was disappointing.
Ministry spokesman Yigal Palmor said it was "not in line with the importance and the quality of the relationship between our countries".
At least four forged Australian passports were used in the killing of Mahmoud al-Mabhouh in Dubai in January. The originals belonged to Australians living in Israel.
The Australian government said a police investigation had left it in no doubt that the Israeli authorities were behind "the abuse and counterfeiting of the passports".
As a result Foreign Minister Stephen Smith asked Israel to withdraw a diplomat, whom he did not identify
"The decision to ask Israel to remove from Australia one of its officers at the Israeli embassy in Canberra is not something which fills the Australian government with any joy," he said.
"On the contrary, the decision was made much more in sorrow than in anger."
Passports from France, Ireland, Germany and Britain were used in the operation, and in March, the British government expelled an Israeli diplomat from London.
The Israeli government has said there is no proof that it was behind the killing, although Dubai officials have said they are 99.9% sure that agents from Mossad were responsible.
Meet George - he wants more children like him to get outside and get into gardening.
[NEXT_CONCEPT]
The Silkworm by JK Rowling's pseudonym Robert Galbraith and Ian McEwan's The Children Act are among 25 British novels in the running for the world's richest literary prize.
[NEXT_CONCEPT]
A driver stopped for using his mobile phone told police he was trying to find the new Sam Smith song on YouTube.
[NEXT_CONCEPT]
Australia has expelled an Israeli diplomat saying Israel was behind the forging of Australian passports linked to the murder of a Hamas operative in Dubai.