Patterns, shapes or texture are effectively isolate by using telephoto lenses in the range of 200 to 400mm. 100mm macro photography lenses work great too. This Lupine picture was captured at 300mm. Focus on the interesting elements of the photography subject to really lead the viewer to the more interesting part of the photograph. Explore the impact of the camera aperture settings to further eliminate distracting background noise. Large aperture as f/5.6 and lower provide a shallow depth of field while small aperatures provide more detail from foreground to background.
Good light and happy photo making!