The hint for this one can be found across the river behind your character's spawnpoint.

Full Explanation

Go into root mode and sprout a plant near one of the elevated portions, and then you can jump on the plant in order to reach the higher-up places.

The hint for this one can be found in the water, behind the player, after failing the jump across that first gap.

Full Explanation

For the first part, sprout a plant off the wall in front of you so you can jump on it and make it across the gap.

For the second part, you will do the same thing except in between each elevated ground block portions.

The hint for this one can be found by turning around from the section's sign, going to the edge, and looking a bit to the left and down. Then you just jump down to that ground pillar from there.

Full Explanation

Sprout a plant off of the extended platform and hop onto it for some extra height. As you jump across and hit the wall of the other side (with your plant still sprouted), enter root mode and traverse all the way to the other side where you can sprout a plant on that side to catch you.

Then similar to the last section, extend the plant off the wall and jump up.

After making it across the "Leap Of Faith", turn left instead of going right towards the section's sign. On the slightly less elevated ground portion, go towards the edge, look left, and the hint will be hanging off the side of the more elevated ground portion.

Full Explanation

Similar to the last section, you will jump across in the direction of the extended platform and catch yourself on the other side. However, now you will need to continuously do the following: jump, enter root mode, despawn your sprouted flower, and sprout another one where you will land in your jump position (which will result in you gaining elevation).

After enough times, you will be able to jump to the top of that elevated ground.