That depends on the types of pollinators your columbines are attracting. If they are drawing butterflies or moths, putting them near your windows can allow you to enjoy them from inside. But if they are attracting hummingbirds, you might not want to put the plants too close to the windows. The reflections in the glass could confuse the birds, which might fly into the windows. Similarly, if your columbines are popular with bees, it is best to keep them away from doors.