Wiktionary
mucking in
vb. (present participle of muck in English)
Wikipedia
Mucking In
Mucking In is a New Zealand "reality" television programme that airs on Television One. It is hosted by Jim Mora. He is assisted by gardener Tony Murrell.
The show features a very similar premise to the show Ground Force, in which a team of gardener and local volunteers employed by the show descend on an individual's place and improve the garden for the cameras within a specified time limit. People whose gardens are made over are nominated by the public, often for the voluntary work they have done within the community.