The Garden Suites is the seventh floor of the The Last Resort in Luigi's Mansion 3. It is accessible after obtaining this floor's elevator button from King MacFrights at his castle. It is a plant-themed area similar to Haunted Towers from Luigi's Mansion: Dark Moon and appears to be an otherwise normal floor aside from it being overgrown with plants, featuring flowers that dispense treasure when flashed with the Strobulb. When Luigi enters the Atrium, he finds the elevator button that leads to the eighth floor on a stand. After he grabs it, a gardener ghost named Dr. Potter pours water onto a sprout, which grows into a carnivorous plant. Luigi gets startled and accidentally drops the elevator button, which lands in the plant's mouth. Dr. Potter waters the plant again, causing it to grow giant, then disappears. This forces Luigi to ascend to the top of the Atrium in order to retrieve the elevator button.
Dr. Potter sets various traps in order to impede Luigi's progress. He waters branches to make them grow and destroy parts of the stairs, forcing Luigi to swing on vines and go through other rooms to continue. He also waters pineapple plants, which causes them to lob large pineapples down the steps. At one point, Luigi heads into the Thorny Bathroom in order to get rid of a thorny vine that blocks his path. When he tries to leave the room, he gets trapped inside and encounters a Slinker for the first time. After capturing it, a Hammer appears. The Hammer has leaves on its face, and they need to be vacuumed off before it can be stunned. After the Hammer is defeated, Luigi can leave the room. In the Ivy Suite, Luigi has to use a buzzsaw to cut some branches blocking the door to the Ivy Bathroom. When he tries to go through the door, he get grabbed by a vine. Gooigi must use the buzzsaw to cut the vine and free him.
When Luigi finally reaches the top, he and Gooigi need to open the plant's mouth to get the elevator button out. Luigi and the button both fall to the bottom of the Atrium, where Dr. Potter uses a smaller carnivorous plant in a pot to retrieve the button. Only after capturing Dr. Potter can he get the button back and access the eighth floor, Paranormal Productions.
Later in the game, Luigi returns to this floor while chasing Polterkitty, who stole the elevator button found in the Paranormal Productions.
There are two rooms, one each on the third and fourth levels, that appear on the map that are inaccessible for exploration and therefore aren't officially named. Given their placement adjacent to the Thorny Bathroom and Mushroom Suite, respectively, they are likely the Thorny Suite and the Mushroom Bathroom.