I listed in Simply Grow on 18 May my ten star plants with which to make a gorgeous flower garden requiring minimum work. I should of course have mentioned mulching the ground after it is planted up and underplanted with daffodils. A decent few inches of mulch saves hours of weeding. Bark is easiest to obtain for me, and composted bark is best for appearance - it looks like rich brown soil. Coarser bark can be used in the middle and back of borders, and is fine under shrubs. Expensive the first year perhaps, but in subsequent years it just needs topping up and as the plants spread there is less bare ground to cover anyway.
It's a good idea to water before spreading it if the soil is dry, and don't put it too close to the stems of the plants. Spread it all over the garden about now - and suddenly all looks immaculate. Simple.