It sounds like you just started. at the beginning on the moon. You have green fruits by the shell and a yellow close to the edge of the mountain.
More yellow fruits are at the center of the crater at the lower level. There you also find soil and lunar raffia.
When you jump off the crater to go to the cave by the cliff - you can catch blue fruits opr pick them up if on a higher level at side of cliff. These are enough fruits to work with to make seedlings and graft them to scare the trees.
Once you scare some plants - you can get more fruits and go from there.
Now to scare the plants - the clue here is seen on the walls of the cliff. You will see which plants scare what other plant. You can then go from there.