Good and not so good

With green and white teas, boiling water is too hot for the tender leaves. As a rule of thumb, I use water that has just begun to bubble and steam slightly. You can experiment with different temps using a kitchen thermometer. With greens, my default steep time is about one minute, but this is often adjusted for each tea. White teas, in my case, get about 2 minutes generally, but some people use much longer steep times. I know of some people who steep white teas up to 8 or 10 minutes, using much cooler water. Experiment. That's part of the fun. The ultimate arbiter is your own taste. There are three basic parameters; water temp, amount of tea, and steep duration. Each can be adjusted to taste..........p*

Many thanks for the info.

yup that's about right. Pretty soon you'll be able to tell how hot the water is to within a few degrees just by listening to it bubble and fizz.