In a trailer for Tuesday's season premiere, the father-son duo disagrees about the future of the famed attraction.
At one point in the clip, Zach opens up about his and his wife Tori's decision to "make an offer" on the "north side of the farm," which his father owns.
However, the Roloff patriarch isn't too keen on his son's proposition, claiming that the 32-year-old "didn't come in to negotiate; he came in to demand."
The clip flashes to Zach with his arms crossed, seeming annoyed at his dad's response as the pair stood on the foundation.
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He then voices his frustrations in a confessional interview, where he accuses the 60-year-old of trying to "make money off his own family."
The Little People, Big World star angrily tells the camera: "Are you trying to make money off your own family, or do you want this legacy that you've preached about for 10 years?"
Matt's ex-wife, Amy, admits that she's not shocked by her son's "falling out" with his father.
The feud, however, is upsetting to Zach, who expresses his desire to "break this cycle."
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Amy seems to agree, later telling the cameras: "Things have changed; things aren't going back."
Things still appear to be tense as Zach slammed his father on social media on Sunday.
FAMILY FALL-OUT
Following the news of Matt putting the home on the market, the father of four detailed the difficult decision in a lengthy Instagram post.
He explained his reasoning behind the sale, claiming his "twin boys" could not work together "toward a possible joint sale."
Zach's twin brother Jeremy previously expressed interest in purchasing a part of the farm, though that also didn't materialize.
Matt claimed that Jeremy and Zach "decided individually that the timing was not right for them to purchase a part of the farm at this time."
He mentioned that "the difficult decision was made" to continue towards his "retirement goals."
Besides Jeremy and Zach, the reality star also shares Jacob, 25, and daughter Molly, 28, with his ex-wife, Amy, 57.
In the comments section, Zach accused his father of "manipulating the narrative right before the season" premieres on May 17.
He argued that Matt was not "taking responsibility for his own actions and blaming others."
Zach slammed his father's "new shocking low of cowardice and manipulation of his family and kids for his own gain."
FARM DEBATE
Matt announced the sale of the Oregon pumpkin farm last week.
According to the , Matt has asked for about $4million with the sale of the "original family home and bright red barn."
LPBW fans jumped at the comments section and slammed the TV personality for not selling to his offspring.
One fan brought up Matt's children and asked: "None of the kids wanted to buy it?"
Matt responded: "They all had more than enough… and very fair chances."
SONS' BATTLE
In March, Matt had planned on retiring and spending more time at his vacation home in Arizona with his girlfriend, Caryn Chandler.
A source close to the TV star told The Sun: "Matt would prefer Jacob and wife, Isabel, to take over the farm, but he's not sure they are on board at the moment."
The insider continued: "He is the youngest son, but Matt knows Jacob has potential. They are on the farm a lot, and Matt thinks this is a good way to teach him a lot of things he needs to learn.
"Zach has also mentioned taking over the farm, and Jeremy has said in the past he would like it.
"So Matt is still kind of stuck on what the next steps are, but he would prefer Jacob."
The source concluded: "Matt is on good terms with all his sons, and Jeremy has been working on making the pumpkin season for visitors, but the situation of who will take over the farm is still an issue yet to be resolved."
Meanwhile, Zach has kept busy as his wife gave birth to their third child on April 30.
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Their son, Josiah, welcomes the couple's two other children, son Jackson, five, and daughter Lilah, two.
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The family recently celebrated their oldest child's birthday with a massive backyard party at their Washington home.
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