Quantity of loose tea leaves
The most common recommendation is to add one heaping teaspoon of tea per cup. However, while this may be true for a particular person and tea, it doesn’t take into consideration the great variations in volume and strength among loose teas.
For example, a teaspoonful of a strong, broken Assam tea weighs about 2.2 grams, while a full leaf Darjeeling weighs about 1.5 grams. Teas with even larger leaves may weigh less than a gram per teaspoon. It is therefore possible and proper to brew tea with as little as ½ a teaspoon to as much as a heaping teaspoon per cup, depending on personal taste.
With a little experimentation and practice you will be able to consistently brew a superior tea.