We'll have to agree to disagree on that, Steve. I contend that it is perfectly acceptable. Orange oil/d-limonene (used in cleaning) is used as a pesticide (mixed in water and compost tea) and in herbicidal uses (mixed with 10% pickling vinegar). Murphy's Oil Soap was one of the originals used as a safe soap in gardening, and it's good to mix a little in water and spray on aphids, mites, etc. Quite often organic gardeners use a small squirt of dish detergent as a surfactant in the mix in the sprayer for foliar feeding of plants. There are lots of commercial versions of organic soap products. The minute amounts of color or fragrance in shampoo are not a problem, and it is probably because of those very ingredients in the shampoo that my lawn expert comrade at the Dirt Doctor site recommended it.

SRS