Creating even a small area of native wildflowers in your garden is a wonderful thing to do, as it is hugely beneficial for bees and other wildlife. It provides a vital habitat for a wide range of creatures that will help support the eco system in your garden. Plus you will have a lot less lawn mowing to do!
However, creating a wildflower area is not simply a case of scattering seed on the lawn and expecting it to grow; seed can be unreliable, so it has to be sown in the right way at the right time on prepared soil. I have successfully planted wildflower areas in client gardens as well as my own, and am well versed in the do's and don'ts, whether laying pre-sown turf, planting plugs or sowing seed.
In the images below you can see the development of a smallish area of wildflowers in a front driveway, framed by a hedge of Nepeta 'Walker's Low' and enhanced by its proximity to the 'fieldscape' beyond.