Here are some general guidelines for tea making:
How much loose tea per cup? My recommendation is 1 tsp. per 8-10 ounce cup. For finely cut black, green and oolong teas a light teaspoon. For leafy herbal teas such as dandelion leaf or lemongrass a heavy teaspoon.
How long to steep a cup of tea? The general rule is 3 to 5 minutes. For black, green and oolong teas stay on the 3 minute side. The leafy herbal teas need to steep longer so go for the whole 5 minutes. Roots, seeds and barks need time to soften to release their flavor and health benefits, so again, 5 minutes or more.
Remember everyone likes their tea different. If you like your teas light then try adding less tea and/or steeping for less time. While some people believe steeping to long makes the drink bitter others like a good strong cup of tea, which might mean a little more tea and a little longer steep time.