You can enlarge the system as plants grow or as new plants are added. Use drip systems to maintain constant moisture in the plant root zone. New plantings need rapid, deep watering that is best done by hand. Once the soil has settled around a new plant, the drip system can maintain moisture. When removing areas from turf, do not cover them with black plastic and gravel, rock or volcanic cinder.
Plastics shed water and create wasteful runoff.
They also exclude essential air exchange to plant roots and increase evaporation from surrounding areas by increasing local soil and air temperatures. Keep rock or gravel areas to a minimum. They tend to increase air and soil temperature. These materials allow water penetration and air exchange. Polyethylene plastics exclude the air and water needed for plant growth and can cause root injury due to heat buildup.