This season 7 week 6 epic quest requires you to plant 3 saplings at Stumpy Ridge, Fork Knife Food Truck or FN Radio.

If you go to any of the 3 locations you will find blue outlines that you can interact with that look like small plants. There are a few at each location although can be hard to see until you get close. You should not have to go to all 3 locations as there are more than 1 sapling you can interact with at each location.