Tucker The reason you rinse the soap off is cause when it dries on the plant it affects the "chlorophyl factory" esp. on potted plants that don't get rained on. I don't rinse my outdoor plants as I usually get enough rain to rinse them off. L.B. Seems every year I see this technique mentioned a few times on the list, but have never seen this question answered, that I recall. So here's what I hope isn't as stupid of a question as I imagine it might be: When you "rinse off" the plants after application, do you need to worry about the soap solution soaking into the soil around the plant? Would the answer vary for garden vs. container plants? I get some aphids on my container plants now and again, but I just can't shake the thought that rinsing soap down near the roots is bad for them. But not being a chemist or a botanist, I have no clue as to the actual danger level. I have some spray from the local garden place that I use when they get too bad. I'm assured by the large corporation that manufactures it that you could drink many gallons every hour and still live a full and happy life to age 150. ;-) And, of course, we all know that these companies would not sell anything to anyone if it weren't 110% safe for anyone and everyone, except aphids.