Green tea brewing time and temperature varies with individual teas. The hottest brewing temperatures are 180°F to 190°F (82°C to 88°C) water and the longest steeping times 2 to 3 minutes. The coolest brewing temperatures are 140°F to 150°F (60°C to 66°C) and the shortest times about 30 seconds. In general, lower quality green teas are steeped hotter and longer, while higher quality teas are steeped cooler and shorter. Tea Masters living in China nowadays say that boiling water must be used all the time even with green teas due to the fact that high quality leaves can handle higher temperatures very well. Steeping green tea too hot or too long will result in a bitter, astringent brew for low quality leaves. High quality green teas can be and usually are steeped multiple times; 2 or 3 steepings is typical. The brewing technique also plays a very important role to avoid the tea develop an overcooked taste. If a tea claims to be high grade but the vendor instructions says that boiling water mustn`t be used then there is a chance that the tea is not so high grade.