This is my Patio area at the back of the house.

The Blue Bush is a "Ceanothus"(Californian Lilac). It flowers in May/June each year and makes a very stunning show of flowers on that bush. In July its best to trim it back a bit, to remove the dead flower heads and some of the growth too. There are different varieties, some that reach different heights too. This one is the biggest, that can spread 10ft if allowed.

Others form a neat clump around 3ft high.

So best to read the plant label, befiore you buy, in case the plant gets too big for its space.