I did this one as a class demo.
I showed how to make a background with a tiny bit of color, and whole lot doze of water.
Then I showed how to paint tulip flower, the stroke, shape, color etc.
Then I did the leaves with very life green. A lot of leaves.
Then I did the leaves again with darker green.
At last, I rolled paper towel and dipped into the color palette. That was the soil.