The Berkeley Hills are in the natural distribution of Trillium chloropetalum. The temperatures are cooler than in San Diego and fog is probably a significant factor. They were historically found as far south as Santa Barbara County, but in a curious disjunct location with number of other species that are clearly much happier further north. I am growing them in inland Los Angeles, but they aren't exactly happy. I have them double-potted to keep their roots cool. I've tried them in the ground, and they failed.
John WickhamLos Angeles
On Tuesday, July 7, 2015 9:35 PM, Diane Whitehead <voltaire@islandnet.com> wrote:
On 2015-07-07, at 6:13 PM, Ben Anderson wrote:
> under coast live oak at UC
> Botanical Garden in the Berkeley hills, where they get something like 25
> inches of rainfall a year, plus some extra irrigation to fill in the gaps,
That's only two inches less than we get, and our wild trillium ovatums don't get any extra irrigation.
Diane Whitehead
Victoria, B.C., Canada