Trillium bloom at our Mt. Hood cabin in late May-June, I believe. Love them. I've thought about digging some up from the cabin property, and bringing them to my yard in Salem---but I haven't done it yet. I don't have a good woodland place for them, so I've chosen just to enjoy them at my "other" garden---which is all woodland, all natural---even get fairy orchids there, which is an amazing delight when I'm there when they are blooming. Oregon oxalis just started coming up out of the ground last weekend.