Blue Lagoon is an excellent Rosemary with cobalt blue spring flowers and contrasting dark green leaves - yes you can use them in cooking. The evergreen shrub undulates and spills as it grows, resembling moving water and grows to a height of roughly 1m tall and 1.5m wide.
Very tough, preferring full sun and well drained soils. Fully hardy to heat and Canberra's cold winters too.