Flushing with garden sulfur

The PH on my soil is a little on the high side, it registers slightly over 7. I am 3 weeks into flowering, and would like to lower it to 6.5 or so. I bought garden sulfur from my greenhouse, and the guy there said to sprinkle a tablespoon or so on my 10" pots and then water. Should I flush the pots with tap water over the sulfur, or just give it a normal watering? I want to make sure that I change all the soil, as the roots are taking up the whole pot. (Which is another thread that I have started and need answers to.) Thanks all.

That could be tastie. Does it smell?

No it doesn't smell, it was reccomended for tomatoes, so I would assume that there is no negative smell or taste associated with it. I opened the package, and they are small water soluble pellets with no smell.

Nice, have you got a meter to test the ppm of a recomended dose?

No, I don't.

Does the bag say what the sulfer is derived from or the type of sulfer it is to the best of your memory?

It is derived from elemental sulfur.

Thanks

An update on the sulfur. I mixed quite a few pellets in a gallon of water, let them disolve, and added them to a pot of soil with no plant in it. The soil was 7.2 before adding the solution, and has dropped to 6.0 with the solution. I may want to cut back on the amount I end up giving my real plants, but it seems to work fairly quick. I'm just scared now of dropping the PH too far.