Top Dew tea is an oolong tea that is harvested only during the winter mornings while the dew is still on the leaves. - The oxidation process starts as soon as it is harvested when the dew is still fresh, giving the tea a unique touch. - All teas are made of leaves from the Camellia sinensis. The Camellia sinensis sinensis is a small-leaved plant native to China and is commonly used for green and white teas. The Camellia sinensis assamica is a larger-leaved plant typically used for black and oolong teas. Top Dew tea shows a stronger flavor and aroma than other oolong teas.