This is incredibly clever! Thanks! I guess some dissolved in water would be good for leaf sprays for some plant ailments? (aphids? I cant remember).
OK, Off Topic (sort of) alert.
Soap solutions are fatal to aphids and most other soft-bodied insects (but harmless to worms and bees and beetles, including the ladybugs that will hunt down the last of your aphids for you). Add about half the weight of soap in common cooking oil to improve the kill rate (shake well and keep shaking during application).
Most fungal infections dislike soap due to the high pH and sodium ions kicking around. Powdery mildew, in particular, can be treated with simple soap (although I tend to use baking soda plus soap as it works better, at a rate of 1 Tbsp baking soda, 1 tsp soap per gallon of water).
Almost every sprayed chemical in the garden can benefit from extra surfactant, but soap is not recommended. Use a non-ionic surfactant made for the purpose in this case, like any good spreader sticker on the market.
Soap added to your Miracle Gro feeder or fertigation system (if you have one) enhances the leaf penetration of the feeding, and also treats the soil at the same time.
Soap sprayed on spots in the lawn or garden that tend to stay dry even in wet weather will help slowly break up the natural grease and waxes that bacteria produce. Soils that are hydrophobic due to excessive dryness can also be dampened this way, and small amounts of soap are harmless to slightly helpful to the plant. Two to four ounces per thousand square feet, monthly, is not excessive but it doesn't need to be done that often by any stretch.