Posted: 25/06/2016 at 08:12
In a formal big border, clusters of plants give more impact than dotting them about. Group the three or five together. If you are planting choice perennials, and can only afford one, use cheap annuals or biennial to fill the spaces until something like a phlox gets bigger and can be split into several to fill a space. Cosmos, dahlia seedlings, lilies,foxgloves, make good fillers. A dozen or so cosmos through a border will give a cohesiveness to it. If you have loads of money, buy three or five of each sort of perennials. in six inch pots, cluster together, and watch it go. Most of my long border, first year was cheap fillers, three years later, I don't know what to do with the cosmos, the border is full.