Start by drawing the basic circular outlines of the petals and center of the flower with a graphite pencil. Divide the circles into four quadrants.
Sketch the center of the flower with charcoal sticks.
Fill in the petals one quadrant at a time. Do not fill in any details. This is what your basic sketch will look like when all the quadrants are filled with petals.
Roughly shade inside the flower and its surroundings using soft charcoal. If the petals get smudged in this process, retrace them with the charcoal stick.
Smooth out the background using a blending stump or your finger.
Smooth out the flower as well. Make sure that there is no loose charcoal on the surface of the paper.
Shade the seed section of the flower. Use your finger or a blending stump to smooth it out. You can also use an eraser to create highlights.
Define the petals by shading the background in dark tones, and shading the petals in soft tones. Use an eraser and a blending stump to create highlights and smooth out the drawing, respectively.
Highlight each and every petal in this way, one quadrant at a time, until you have completely defined the entire flower.
Now, define the seeds by erasing the highlights in the seed sections.
Use a white charcoal stick to roughly shade in the petals.
Detail all the petals one by one in a clockwise manner, one quarter at a time.
Add some finishing details. Your charcoal flower drawing will look something like what is shown in the final image in the slideshow above.