Every gardener would like to hope that once order is achieved in the garden, the thing will maintain its equilibrium indefinitely. This is not the case. Even the best-laid plans of mice, men, and gardeners go awry. Things as fickle as the weather in a season can reduce the population of any of the beneficial fauna. A planting may simply not attract as many butterflies as one might wish. At this point the gardener must step up operations to reintroduce or encourage the growth of the type of creature affected by the change. It is a constant balancing act. Perfection and gardening bliss may never be achieved. The point for many of us, though, is that we come so close, and we believe that perhaps one day it will be possible.
This is the joy of gardening.