We have a few areas on the property where there are long straight fence lines like this. We always thought of flowers, but never thought about doing it like this. Kind of a long narrow flower bed and then populating it with bulbs.
Such a long space like this would allow bulbs that bloom at different times of the year as well. Heck, this just makes us think of bulbs randomly along the fence line, not even in flower beds, instead of planting bushes. There are plenty of spots for bushes elsewhere, this just seems kind of nice and casual.