Will be in Hangzhou from 07 April, what is the weather that time? and is it possible to see "tao hua" blossom ?

Generally speaking, late March to early April is the best time to see the Peach blossom and the best place to enjoy it is around the West Lake.
However, the real situation depends on the climate. It is suggested to keep attention on the local climate and then arrange your trip depends on the real climate.