Moodster..... Just sprinkle on 1 teaspoon, about an inch out from the main stalk. Lightly moisten and no worries. 1 teaspoon in a volume of soil, between 1/2 gallon and 1 gallon, will have very little effect on pH. The micro-beasties in your soil, will break it down and tend to level out the pH, provided the container does not get over watered.
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If you have some worm castings, sprinkling some of them on, in equal amounts, tends to help keep soil pH stable and provides extra micro-beasties to keep the root zone happy.
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Hope this helps....
Keep it Real...Organic.....
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