Have you emailed the owner of the site where you found the photo? If the owner isn't the photographer, be sure to get the contact info for the photog.
What does s/he say these plants are? And, almost more importantly: WHERE are they growing?
If they're growing in "California" or any other state with several different bioregions, see if you can get a more specific description of WHERE they are: a town or perhaps a county.
And, to learn whether you're doomed to total frustration or not re. these plants, where are you located (approximately)? There are certain plants that require hard winter cold/freeze for proper dormancy and cannot grow in the SF Bay Area because we're too warm (lilac trees come to mind), and there are plants which require tropical heat and cannot grow here because we're too cold rather than too warm (mangoes...).
It could be that at least some of the plants in the photograph won't be suited to your climate. But you might be lucky!
Maybe you live in their zone.
Please let us know what you find out.
USDA Zone 9, Sunset Zone 17