"Let's Get Growing" is the main game mode where the player grows a variety of plants in a garden, ranging between flowers, fruits, and vegetable. Players initially start with only a few flowers, but are able to unlock more plants and garden areas after finishing complete flower cycles (from planting the seed to when the flower blooms). Like previous Mama games, for a plant to grow the player needs to complete a series of mini games; however instead of playing each stage consecutively, only one stage can be played at time. The next stage becomes available once the player completes another stage for a different plant, or the next time the player turns on their handheld device.
After completing a stage, the player's performance is evaluated with a numerical score out of 100, and awarded either a bronze, silver, or gold medal. After completing a full plant cycle the player's overall performance is evaluated, and given an averaged score out of 100 and a corresponding medal.
There are many different mini-games available, for example: planting seeds/saplings; watering plants; cutting off or removing weak/dead parts of plants; shooing away pests and rodents; harvesting produce; and making rainbows using a watering hose.
Players also have a "practice" option.