I have two of these plants in my garden. They bloom non stop from early on in July until well into September. They are able to be successful even in periods of the inevitable summer drought we get each season.
Here are pictures of one of my plants taken yesterday.
From a distance in this "carefree" garden ie never weeded ;) (The Kalimeris is on the left side of the picture)
Then the Kalimeris plant on its own
And finally a close-up of the flowers
