Over time, plants in a garden drift. More aggressive plants overtake their shyer neighbors; shrubs overshadow smaller plants. Some plants may stop growing or blooming due to crowding, while others may be too dense. While a certain amount of plant drift may be welcome—after all, it’s your perennials’ way of letting you know where conditions are best for them—other drift may be unwelcome and require interference to keep your garden looking its best.
Fall is a good time to survey your landscape, see how your plants are doing and do some adding, subtracting and dividing.