When you say floor plan, you mean floor plan, right? That's a cad drawing that is colored by ps export. Aerial views and renderings must be 3d, not ps.

Because I have never done a master plan of landscape, I always do a master plan of architectural design, which is similar to yours. First, look for materials of trees and squares on the Internet. If you can't find them, you can give me your email and I'll send you some in the past. Then export different layers in cad several times, one layer of text and one layer of base map. In ps, the text layer is placed on the bottom map layer, and the positive film is stacked on the bottom. Then click on the part you want to draw on the base map with a magic wand, usually starting from the green space, and adjust the transparency and color with a brush. Transparency is not the transparency of the layer, but the transparency of the brush. Create a new layer and start coloring the green space. After the green space is colored, the square ground is colored. Magic wand Click the place to fill, and then click Pattern Fill. Finally, just put the material tree in the picture and copy the tree.

It's easy to say, but it's still difficult to do. You can ask me if you don't understand anything. I will send you a psd file I made.