[These are perennial in San Diego. Mine has now overrun three fruit trees. But it blooms most of the year.] Black-eyed Susan vine - you must plant one of these in your garden this year - it's the vine that keeps going strong all summer long
Love Lily of the Valley! Also makes a wonderful ground cover perennial. The very fragrant flowers appear in abundance in April and May. They are ideal for growing in wild or woodland gardens or use for ground cover in a damp shaded border.