Hamilton artist Brendon O'Farrell says if people want lemons from his tree, they should ask.

A "repulsive" attack by two teenagers on a Hamilton man's home has left him unable to sleep in case they return.

Fairfield artist and father Brendon O'Farrell​ caught two teenagers stealing lemons from his tree close to midnight.

"One of them got toey with me and I said to him, it's f...... midnight, go away, f... off," he said.

They fled and he went to bed. He also informed the other people who share the rental property as well as his closest neighbours.

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But it wasn't the least he heard of them.

The following evening, January 13, he was woken by his son around midnight. As soon as he turned the lights off to return to bed, he heard his house being pelted with lemons. He then heard something being thrown through his open bedroom window.

It turned out to be what he strongly suspects is human faeces wrapped in a paper towel. The excrement splattered all over the window sill and a telescope resting against the wall and the lemons left splatter marks all over the cladding and windows of his son's bedroom.

"That's just repulsive," he said.

MARK TAYLOR/STUFF Teenagers allegedly threw lemons at Brendon O'Farrell's house after he caught them stealing the fruit off his tree.

The act unleashed a tidal wave of anger within O'Farrell, who saw the attack as a violation and an act of cowardice.

​"This is my home, I don't want to be dealing with someone else's problems. I don't feel threatened, just really angry. This is my Shangri-la, it's where my son lives and I have my artwork. It's been my home for the last two years and I don't like it being invaded like that. It's an invasion."

It has affected his ability to sleep. The night after the attack, he was awake until 4am waiting to see if they would return so he could track their address and let justice take its course.

"I couldn't sleep. I was waiting for the little s.... to turn up."

He does not know who the teenagers were but suspects they are local and he has a "rough idea" where they live. He suspects they were waiting for the household to go quiet for the night before they began their assault.

If people wanted lemons from his tree, all they had to do was ask, he said.

"I don't mind sharing them."

He believes they may have been stealing fruit from the tree while he was on holiday.

He notified the police but was frustrated at their lack of empathy. They told him they would visit him in the next few weeks.