If a new tree suddenly appears in a street near you chances are that the Phantom Planter put it there.
The masked eco-crusader has become Northern Ireland's Banksy of nature, secretly planting thousands of trees in community spaces.
The environmental superhero keeps his identity a mystery to promote his mission to give back to nature and protect his simple lifestyle as a Buddhist living in a caravan in Belfast.
It is a world away from the life he created for himself in his 20s as an entrepreneur with "more money than I could spend in a lifetime".
He made a fortune through setting up a number of successful businesses but lost it all through a 10-year battle with addiction before turning his life around at the age of 35.
Since then he has shunned the trappings of the rich lifestyle he had worked so hard to achieve in favour of a more simple life in tune with nature.
And as part of that he has been on a mission to plant as many trees as he can across Northern Ireland while inspiring his thousands of social media followers to do the same.
The 39-year-old, who keeps his identity secret, says: "I grew up in a loyalist estate in Belfast and I was a real 'Del Boy', selling what I could. I had my fingers in every pie. I had shops and cash for gold businesses and a waste disposal company.
"I would say at 25 I would have been worth over a million pounds but I was drinking every day and didn't realise I had a problem.
"Over the next 10 years everything started to go downhill with drinking and gambling and I became bankrupt and lost everything."
The turning point came when he was taking part in a Viking boat race on the River Shannon.
He was drinking heavily and when he realised he had run out of alcohol, he jumped into the water and was taken by a local farmer to a nearby Buddhist monastery in Bawnboy, Co Cavan.
Realising that he had hit rock bottom, he asked the monks if he could stay with them for a few days.
Three days later he left a different man. That was three years ago and ever since he has been on a crusade to give back to nature with his anonymous tree planting.
He recalls: "I rowed this Viking boat down the river Shannon for a bit of craic one day.
"I was an alcoholic mess and was drunk on the boat and when my beer ran out I wanted off.
"I went to the monastery a drunken mess and stayed with the monks for three days. They welcomed me in with a smile and my life changed that day.
"The Buddha provided me with all the tools I needed to change my life. It made me realise that everything was my own fault, we make our own problems in life, and no one else is to blame but us.
"My mind was blown by how these monks can live so simply and happily.
"I decided the rat race was no longer for me, how I was living was not in harmony with nature and our world.
"My days of selling the earth's resources to feed my habits and ego are well gone.
"Buddhism is a beautiful way of life, it's brought me to a place no money ever could have bought and when your thoughts and actions are of benefit to the world, in return the world and everything in it will benefit you.
"Now for me it is about not what life can give me but what I can give life. That's what Buddhism has taught me."
Having grown up in a loyalist housing estate in Belfast, most of his focus is on planting fruit trees in estates around the city. He also plants native trees in the Mournes.
While hiding his identity, he hopes his mask makes him more visible to kids from estates to encourage them to also get out and enjoy nature.
He explains: "I want people from the estates to change and plant trees and be happy. I want to plant the seeds in everyone that we can all change and be happy.
"If I went into those estates as a hippy tree-hugger the kids wouldn't entertain me but with the mask I hope it looks cool and maybe they see it as me getting up to a bit of mischief and hopefully it makes it trendy for kids to do it."
Initially he did try to plant trees by the book, asking for permission from councils, but says two years later he is still waiting for an answer.
He funds his generous tree planting by running a small business, buying the trees with the profits.
"I don't just plant trees all over Belfast but I also maintain them and go out and water them. I have set up a wee business again and the money I would have spent poisoning my body I now set aside to buy trees," he tells me.
The Belfast man has ambitions to get people all over the world planting trees and in a short time has amassed several thousand followers on social media as The Phantom Planter.
He adds: "Basically I want to achieve a domino effect and let people know life is not all about greed; there is no happiness in that. The more I study Buddhism the more it enriches my soul.
"Since setting up a group on Facebook I know of someone who has become a Phantom Planter in England now which is amazing.
"I want this to go global. It isn't about me, I want it to be about the trees and inspire everyone to get involved.
"Planting a tree can change your life and people need to get kids involved and get back to nature."
Follow our mystery man on www.facebook.com/thephantomplanter