I find that a visual breakdown of how an image is colored can really help to develop the process of layering color. Here is a quick sample. All colors shown in bold text refer to Prismacolor© pencils.

With your Chartreuse pencil, quickly lay in the green on the outer margin, leaves and between the flowers. Use Ginger Root for the background.

Use Lime Green on part of the leaves and about 1/2 way up behind the leaves (use a light touch). Add a bit of Lime Green to two corners of the green margin. With Hot Pink, color the inner margin as desired. Apply a medium heavy layer to half of the pot fading out toward the center. Color a random selection of tulips.

Add a little Process Red to the edge of the pot to make it pop. Color in a few more tulips.

With Scarlet Lake, color in the remaining tulips.

To anchor the flower to the pot, add a bit of Dark Green in the spacer between the flowers and leaves. Be sure to leave some of the lighter green exposed near the top and sides. Layer with scraps of complimentary colors and your image is done.

Note: These tulips look great in yellow's with a french blue pot...assorted colors of flowers and a zippy lime green pot.
Have fun!