Life Cycle
Sustainability in a broad sense, is the capacity of maintaining a certain process or state. An example of a sustainable plant would be an appropriate material that is allowed to grow to maturity with minimum maintenance.
Efficiency is much the same- an efficient planting will allow for minimal maintenance, water and fertilizer. Efficient landscapes allow for reallocation of resources.
Aesthetics -There is no perfect palette for every situation. So here is a list of question to ask when considering removing material:
1. In what way will the property be effected by removing this material? Will this removal add or subtract value?
2. What grade would you give the quality of the material? A, B or C ?
3. What life cycle stage is this material in. Improving or Declining. If declining, what is your plan for replacement. Give a grade for the declining material and create a list of plants that fall in to "A" material.
Establishment-
Now you have made great decisions on removals and replacements. What's next? Make sure the contractor is attending to the new material. New plantings require TLC up front.