Using beneficial microbes and/or fungi is the way to go. The fastest and best way to see results is to use a tea. If you are using beneficials, you need to be filtering your water. If you are on city water it is most likely treated with chemicals such as chlorine that will kill beneficials. RO filters will keep this from occurring. Also use a sugar product, as this is food for beneficial microbes. Enzymes also help in healthy root production (I use Hygrozyme).