In the old days, window boxes and pots got filled zonal geraniums (Pelargoniums), some variegated trailing vinca (Vinca minor) and perhaps some “spikes” (Dracaena). Although all of those plants are still available for people who want them, there are scores more to choose from. In fact, there are so many annuals and tropicals available that sometimes it can be hard to choose. Here are some tips for filling window boxes and some suggestions for reliable plants for season-long flowers.
Note: Join in our Sunday Seminar about Window Boxes and see dozens of inspiring combinations and design ideas. Sunday, May 16th at 4 PM. Register on our events page.
Think of your container components as Spillers, Fillers and Thrillers. Spillers hang over the edge of the box or pots, Fillers are the mounding plants that create the body of the arrangement, and a Thriller is either a tall, upright element or plants with leaves that aren’t green.
Don’t be afraid to pack in plants in a window box – the season is short, and it’s fun to have them looking spectacular from day one. Be sure to have drainage holes in your boxes, and use new potting mix every summer.