The whole is such touch.Since it is after rain, the petal is getting wet and giving a few.

A close-up of a flower. It is said that what Goto of this garden actually saw in Himalaya was bluer.

another stock -- it has got wet after rain again. Purple is a little deeper than the upper thing.

A close-up of a flower. It has five petals although the upper thing has four petals.

The next bud has already swollen also on the stock which the second flower finished.
If a first flower finishes a second flower will open, and if a second flower finishes a third flower will open.
Since one blooms at a time in order, the time when a flower can be seen may be long.