Was the fruit you refer to very sweet, smaller than normal, and highly flavored? I've been told that the best fruit in CA is grown dryland in areas with winter rainfall, deep soil, and old drought tolerant trees. That says the exact same thing to me that you stated above. @Fruitnut, Yup, exactly, especially with the sultana style grapes. Although with some fruit it's more to it than just small and sweet like with the grapes, for example pomegranates can get pretty complex flavors on the spectrum of sweet to tart when they're in the middle there of both and when the pits in the seeds become negligible instead of hard as wood chips- or when a nigra mulberry is just huge and so juicy but still extremely flavorful or maybe you've seen here but I haven't when a fig is so ripe the red pink nectar is oozing out from the bottom hole or when a pomegranate bursts open on the tree from the sun fully ripening it not bursting open from a disease or because of excess rainfall. But yeah, definitely a trend of smaller and sweeter exists I'd say- another common example of that would be the strawberries- they're tiny/mushy not aesthetically pleasing at all compared to grocery store strawberries here looking epic and beautiful... but the taste is something else with the small ones. This phenomenon of not watering the wild fruit (which are usually in not so easy places to go pick the fruit) has a name for it in Iran- "bash" lots of different fruit can be "bash" meaning grown wild in drought like conditions. I suspect the trees are pretty old too. I think pomegranate exists like this too- I've had fig and grapes bash before. All that being said, I've had some of my best fruit experiences here too. I was actually born in Virginia am pretty proud of our watermelon and peaches here :). The mid-Atlantic and South can grow very delicious fruit- I've always been impressed with how good fruit can taste in the U.S. once it's actually grown right instead of bought from a typical grocery store. BTW lots of fruit is now being imported to Iran along the same lines of typical grocery store fruit here and it's messing up the market for good tasting local fruit. I'm afraid in very short time if not already typical Iranian fruit markets will be worse than grocery store fruit here... before they all see the light again and start going old school/eco-friendly/green/homegrown/local/organic what have you like what's happening here.

Heirloom Roses may be the nursery that I visited some years ago, when I lived for a few years in Portland. It specialized in old roses, and when I went they were at the peak of bloom and knocked my socks off. I had loved old roses from pictures in books, but had never seen them growing and it was like being in an eighteenth century painting! Big bushes, like hoop skirts, covered in bloom, and a pergola (not sure that's the right word - a long, walk-through arbor) covered with blooming climbers draping down from it. The fragrance in that place was dizzying. I don't remember now if that was the name, so can't be sure if it's the same place, or if the place I visited is even there anymore. But if it IS the same place, I really recommend it.

"Roughly speaking, how much of the flora is unable to grow on the West Coast?" Seems like it's usually more like what won't grow here? (Often with bad consequences, in the case of invasives.) For instance, my mother is endlessly frustrated by my interest in native plants (she is in New Mexico), as she says "You can grow ANYTHING there and you plant plain old Apricot Mallow???!" lol. Of course, I still have a lemon tree, orange tree, palm tree, tea tree, orchid tree, hibiscus, hydrangea, avocado etc....Full disclosure: I am a newbie and just got some actual dirt a year ago - but it has been amazing to learn about this amazing climate - which is Mediterranean btw. Often I wish there was a California version of every forum here - particularly veggies, since our planting times are totally different. Some books I like: Mediterranean Kitchen Garden: Growing Organic Fruit and Vegetables in a Hot, Dry Climate by Mariano Bueno, Pat Welsh's Southern California Gardening, and California Native Plants for the Garden by Carol Bornstein et al. The Sunset Bible is also on my shelf. The micro-climate is crucial - I am in East LA and have a totally different zone than you will in Santa Monica. One thing that I'll add to look into for native plants is the Theodore Payne Foundation which is local - it's really a neat non-profit nursery and educational resource.

Perhaps you could have a trip to Mount Annas(Correct Name?) which I beleive has native plants from all over and discover what they do with the WA natives. I thought Kangaroo paw like it a bit damp and sandy. We had a man from Strathmerton,Vic.speak at APS the other night who ripped up his clay fairly deeply, mulched, hilled and swailed, and had good results. Yes it has to do with microclimate and soil . Research to learn about the plants' natural habitat. After all some WA plants do not grow in sand. Don Burke has a good native garden. But Mount Annas National gardens would be your best bet.