Another sure sign of spring is the white wisteria that blooms in the "secret garden". The vine always sneaks up on me and seems to bloom overnight. I usually notice it from the opposite side of the garden wall where is rises above it. You can often smell it before you see it!
As lovely as April is, the peak time for our garden in is May. That is when the roses are blooming and the garden is like a fairyland. In late May, the hydrangeas begin blooming (we have about 50 varieties) and later the Oakleaf hydrangeas remain in bloom throughout the remainder of the garden year.