castile soap

I bought some castile soap with the intention of controlling a mold problem with my plants. The stuff I bought has a lot of different ingredients and Im curious if whether or not these other ingredients are good for my plants. This is what the soap bottle says: "Dr. Bonner's Magic Soaps...

"Tea Tree Oil Spray A spray made with tea tree oil makes for very effective fungicidal control against plant mold. Mix well together 1 tsp. of tea tree essential oil and 1 tsp. of liquid castile soap with one gallon water. Spray the mixture on the topsoil and plants to get rid of mold...