Thanks, Val!
One of the things with macro photography when done properly, using a genuine macro lens that allows you to get really close to the subject, is that unless you really close down the aperture of the lens, you tend to finish up with a very shallow depth of field. So some parts of the image may be in really sharp focus, but other parts, maybe only a millimetre or so closer or further away from the lens, are blurred.
But a problem with using a small aperture is that, because it means less light is getting though the lens to the sensor (or the film in the old days), you need to have the aperture open for a longer time to get enough light through. In this case (photographing the seed head) the plant was moving in the wind, so I had to open the aperture as wide as possible to avoid motion blur (in which case everything would have been blurred).
But, as you say, I think it worked.
[Here endeth today's Photography 101 lesson]