Sorry, I just noticed this thread, should visit more often. 'California Sunshine'
Has graced my flowerbeds for 25 years and while I have discarded many cultivars in that span of time, CS is here to stay. I love the color and the form, performance has been great. It has been divided countless times and has rebloomed in most years, as long as it got enough water. It often starts blooming in April, sometimes early May and will go to mid or late July. What more can you ask?