Guerilla gardening has been sweeping the world in recent years and there are clubs in a number of different cities from London to Los Angeles.
Enthusiasts such as Richard Reynolds don't see their activities as particularly harmful – in fact, they think they are beneficial and are just the latest phase in a long-established tradition.
But the fact remains that many such projects are illegal. So what if you like the idea of guerilla gardening but don't want to break the law or trespass on someone else's land?
There is, of course, an alternative – one which sounds less glamorous but is also much less likely to get you into trouble.
Community gardening projects are perfectly legal ways of improving your local neighbourhood and can achieve many of the aims of guerilla gardeners.
If you like the idea, the first thing you'll need to do is to drum up some local support for the project.
Admittedly, you might think your neighbours are a bit antisocial and wouldn't be interested in such a scheme – but unless you decide to broach the subject, you'll never know.
Once you've established a group, How Stuff Works recommends drawing up bylaws and outlining what's expected of each member.
Once you've rounded up some sponsors, you can secure a site for a community garden by buying or renting the land. Many landowners will be willing to lease their property for a small fee. It's best to find an area with a lot of sunlight and access to running water, of course.
Community gardens can also have beneficial effects – they could help to mitigate the effects of climate change by making more locally-sourced foods available, for instance.
There are plenty of opportunities to get involved in community gardening through the Royal Horticultural Society's Britain in Bloom and It's Your Neighbourhood initiatives.
It's Your Neighbourhood is a grassroots campaign that helps people make lasting improvements to their local areas.
The RHS provides advice and guidance and annual feedback from assessors with tips for making further improvements.
Whichever route you decide to take, there are plenty of ways to achieve the benefits of guerilla gardening without the legal hassle.
