shastensis, According to Dr. Bob Zybach of Oregon the old growth in the Northwest was comparable to today's old growth over a century ago in the settlement era. He studied fire history in the state of Oregon and believes most of the trees were second growth when the white man came. Zybach has said reports of Douglas fir in excess of 300 feet are mostly stories that cannot be documented, and he has said that the city of Vancouver BC was a prairie before the white man came. I think his views are the minority opinion. He was a reforestation contractor for 20 years, so I value his input. Most estimates I have seen suggest between 70 and 90% of the biggest and oldest Douglas fir forests have been logged in the past 130 years. In some places like Southern Vancouver Island up to 99% of old growth fir is said to be gone. One need only look at the hundreds of old logging photos of giant fir and cedar to get an idea of how large the lowland forests once grew, and in places like present day Seattle, and Vancouver BC. To deny all of this pretty much tells me one would have to be a lobbyist for the timber industry, but that is just my gut feeling.

"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.

Don't underestimate the UV in foggy climates. It can actually be higher than one thinks. Looking down at plants is very different than viewing them at eye level. I have a bed that I view more often looking down from above, out of my kitchen window, than I do while passing by to work in my front or furthermost back yards. This is the triangular bed viewed as standing in my neighbor's yard on the left side of it: This is the same bed viewed from above, although the coleonema (which surrounds the lamppost) isn't in bloom here: Everything I plant in this bed is planned to look good from above. I have 15 separate beds and this is the only one I treat this way. I have fiddled a lot with the plants in it since it lives on runoff so is one of my few truly xeric beds. It gets very little direct sun but a lot of very bright shade (it looks south/southeast, instead of north like yours), so it can take even sun-lovers like the purple Lantana trailer on the RH side. One small shrub I have in a north-facing bed MIGHT work for you, but I'm not sure. It is a regular water lover, not drought resistant. I love this plant! It is a variegated fuchsia, "Firecracker". A bit tender, so it would probably do better for you in SF than it does for me in the Oakland hills.

Hello again Rodaf, I've done a little research and come up with the following list. A couple reinforce my previous thoughts. I think you may already have considered and discounted some of the others, and some may be long shots. But if I was in your position, I would try them all and see how I went. Cheers, Frank Angophora floribunda Geijera parviflora Brachychiton populneus ssp. Populneus Brachychiton rupestris Brachychiton australis Petalostigma triloculare Flindersia maculosa Flindersia australis Atalaya hemiglauca Pittosporum phylliraeoides Pittosporum rhombifolium Santalum lanceolatum Ficus platypoda var. platypoda Erythrina vespertilio Agathis robusta Grevillea robusta Euroschinus falcata var. falcata Callitris glaucophylla syn. C. columellaris var. campestris Araucaria cunninghamii Syzygium corynanthum