The best way to create the meadow is to use the crushing sponges aviable from yout dealer. They are applied after having spread the ground with vinyl glue mixed with water.
Then spread a second time the meadow with the vinyl glue using the sprayer for plants or with a hypodermic syringe. The ground cover are on trade in different grain size and colors: you can use different nuances, because the meadow color is not uniform.
The Nature is a great source of inspiration. Use also red and yellow colors to simulate a bloomed meadow. Bushes can be done with some big pieces of sponge with a realistic shape to give an irregular effect.