Greywater Precautions
...ation by contact with contaminated water is low. Do not apply greywater to lawns (lawns are evil anyways) or to the foliage of any plant as this can cause a microorganism growth party. Remember that greywater is treated by moving through soil. Greywater tends to be alkaline, so avoid using greywater on acid loving plants such as citrus, ferns and other forest plants (pretty much anything that grows in the shade). Occasionally irrigate your plants...