Do not use initial wash water. When you irrigate with waste water, rake the irrigated soils lightly and frequently. This prevents a crust that could seal out oxygen. Soil bacteria need oxygen to degrade detergents, bleaches, softeners, bluing and starch. These additives decompose quickly if soil bacteria can attack them.
Excessive borax can be toxic to certain plants.
New plantings need water every 5 to 7 days. The needles absorb moisture more readily than deciduous trees. Garden Watering Tips Garden produce requires a water supply equivalent to about an inch of water a week during the growing season. This amount will improve growth and produce quality plants. Gardens should be soaked once a week rather than frequently watering.