Start off by walking to the door on the other side of the port, enter the Thornwood.
Go forward then turn off to the left into the small area with the glowing bean. Guess what... Yes that’s right you want it absorb it into a black Magnus and use it on that small vine up ahead and it will glow into a vine bridge. Go to the next screen, here you talk top the man, he tells you "The boulder is blocking the way oh no!" what ever will we do...

Simple, get another yester bean. Find yester bean (forgot where it was) then chase the balloon gator that steals it until you get back to the first screen. Push that green spiny ball off the ledge onto the path then continue the balloon gator chase until it pops itself. Get back to that giant rocks and use the yester bean on the vines near it continue northward.