Practice time:

1- On the terrain, insert a forest combined of 2 different species. Indicate 4m/13 ft , as the minimum distance between plants.

2- Create a hole in the forest, where there is a path. To do so, select the forest, then in the edit panel, upper right side, click on the text of forest, click on add a hole. See image 1.

3- Create some surfaces where indicated in the image 2. Elevate those surfaces to the same height that you have created their surrounding curbs or walls. Change their material to a lawn material. To do so, select the surface and from the properties panel, in material tab, change its material. Look for grass material in the material library.

4- Place a row of trees, and some individual plants in your desired place.