Season 3 is the third season of The Greenhouse's American adaption; Greenhouse Academy, comprising of 8 half-hour episodes. The season was announced on July 25th, 2018 and will premiere on Netflix in 2019.
It was later announced on September 18th, 2019 that the season would be premiering October 25th, 2019 on Netflix.  The season is now available to watch on Netflix.
Season 3 begins with the Greenhouse Academy being 10th place on the school's leaderboard. Louis believes that this is because the Eagles and Ravens are too friendly, so he sends them on a gruelling 2-day hike. On this hike, many of the Greenhouse students are injured. This is because Louis asks Coach Davis to build up the competition between the houses. At the end of the hike, Sophie falls off the mountain and is seriously injured. The state calls for an investigation to be held about the circumstances surrounding the hike. During the interrogation, what Louis did was revealed and he resigned from his role at the Greenhouse. Ryan Woods (Hayley's and Alex's mum) replaces him as Headmaster.
|25||The Hike||Giora Chamizer & Janae Bakken||Roee Florentin||October 25th,2019|
|When the Eagles and Ravens start getting too friendly, the headmaster sends them on a two-day hike devised to reignite their competitive fire.|
|26||The Interrogation||Giora Chamizer & Janae Bakken||Roee Florentin||October 25th,2019|
|The fallout from the hike reverberates inside and outside the school, leading to hard questions -- and a difficult decision.|
|27||The Perfect Solution||Giora Chamizer & Janae Bakken||Roee Florentin||October 25th,2019|
|Brooke scrambles to keep a secret from Alex during an upheaval at the Greenhouse. Sophie's past choices threaten her current status at the Greenhouse.|
|28||Your New Best Friend||Giora Chamizer & Janae Bakken||Roee Florentin||October 25th,2019|
|As a sinister plot targeting the school unfolds, Hayley embraces her new lifestyle, annoying Leo, while Brooke argues with Alex about her brother.|
|29||Old Trophies||Giora Chamizer & Janae Bakken||Roee Florentin||October 25th,2019|
|A remarkable gift from Ryan boosts the Raven's flagging spirits. Becca smothers Leo with attention. Brooke makes an impulsive , ill-timed decision.|
|30||A Piece of Moon Rock||Giora Chamizer & Janae Bakken||Roee Florentin||October 25th,2019|
|Members of the Eagles and Ravens team up on a risky mission to find a valuable chunk of magnetite. A disheartened Brooke looks to make a new start.|
|31||The Hidden Flag||Giora Chamizer & Janae Bakken||Roee Florentin||October 25th,2019|
|While the Eagles and Ravens compete in a capture-the-flag challenge, Enzo receives a mysterious offer that's too lucrative for him to question.|
|32||The Beeps||Giora Chamizer & Janae Bakken||Roee Florentin||October 25th,2019|
|Hayley's determination to get to the bottom of an annoying beeping noise, unwittingly sets a deadly chain of events into motion.|
- This season will feature the first appearance of Danika Yarosh as Brooke after Brooke's original actress, Grace van Dien, left following Season 2. It will also be the first season to feature Dana Melanie who replaces Aviv Buchler as the actress who plays Emma Geller, as well as Rafael Cebrian who'll be playing new character; Enzo.
- This season will be based upon the first half of the original show's second season.